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Introduction: Providing adequate analgesia during subcutaneous ICD implantation can be a challenge. The use of regional techniques such as erector spinae plane (ESP) block can provide both analgesia and attenuate the risk of opioid use especially in high-risk patient populations. Methods: This was a single center, prospective study of patients undergoing SICD implantation from February 2020 to February 2022. Patients were older than 18 years of age and randomly assigned to receive ESP block or traditional wound infiltration. The primary outcome was the overall use of perioperative analgesic medications in the ESP block versus the surgical wound infiltration group. Descriptive data are reported as count, mean, or median, as appropriate. For group comparisons, Fisher’s exact test was used for categorical variables; the student t-test was used for normally distributed continuous variables, and the Krustal-Wallis test was used for skewed continuous variables, as appropriate. Results: 24 patients were enrolled in the study. 11 patients received only wound infiltration and 13 patients received left ESP block. A significant reduction of intraoperative fentanyl use was observed in the ESP block. The overall postoperative day zero fentanyl use was also significantly decreased in the ESP group. The day to discharge was shorter in the ESP block group. Conclusion: This feasibility study showed that ESP block is both a safe and effective technique and demonstrated a significant decrease in intraoperative and postoperative opioid consumption that may be of clinical benefit in high risk patients. Larger studies are needed to further validate its use.

Objectives This study sought to identify electrocardiographic (ECG) and clinical predictors of sudden cardiac arrest (SCA) in sarcoidosis. Background Sudden cardiac death (SCD) is the leading cause of death in cardiac sarcoidosis (CS) and may be the earliest manifestation of disease. Widespread or repeated advanced imaging is a challenging solution to this problem. ECG is an affordable and widely accessible modality that could help guide diagnostic approaches and risk stratification. Methods Data were obtained from the National Inpatient Sample (2005–2017) using International Classification of Diseases-9th Revision and -10th Revision-Clinical Modification. The primary outcome was to identify predictors of SCA, whereas predictors of SCA in young individuals and those with normal ventricular function served as secondary measures. Furthermore, temporal trends in sarcoidosis as well as SCA were also analyzed. Logistic regression analysis was used to calculate odds ratios, following which a multivariable regression was used to adjust for potential confounders. Results Electrocardiographic markers of AV node dysfunction or bundle branch block are associated with substantially increased risk of SCA in a limited proportion of patients (8.6%). This association is also observed among younger patients ( Conclusions ECG evidence of AV nodal dysfunction or distal conduction disease should raise suspicion for cardiac involvement in patients with sarcoidosis and are associated with increased risk of SCA. ECG markers could help identify patients who would benefit from advanced imaging. The sensitivity of ECGs is, however, limited and presence of a normal ECG does not reflect a low risk of SCA.

Amiodarone is increasingly used in cardiology due to convenient dosing, low frequency of pro-arrhythmic effects, and good short term tolerance without significant hypotension. However, chronic use is associated with multisystem toxic side effects. We describe a rare case of amiodarone induced blue-gray skin discoloration.

Left atrial appendage closure (LAAC) is an intervention aimed at stroke prevention in nonvalvular atrial fibrillation (AF). There is a three-fold increased risk of stroke in patients with concomitant presence of AF and heart failure (HF). While anticoagulation is effective, only 60% receive it. We aimed at studying the safety of LAAC in HF patients using a national all-payer database.We queried the National Inpatient Sample for the year 2016-2018 for WATCHMAN device insertion using ICD 10 procedure codes. We divided the study population into HF and non-HF groups. Outcomes were compared using appropriate statistical tests, p .05 was considered significant.34 385 LAAC procedures were identified of which 8530 (24.8%) were done in patients with HF. The mean (SD) age of the study population was 76 (7.9) years and 42% were female. There was no difference in mean age between HF and non-HF groups. Our findings indicate that there is no difference in inpatient mortality and cardiac complications between the HF and non-HF groups. However, noncardiac complications including acute kidney injury and respiratory failure were higher in the HF group.LAAC appears to be a safe procedure in patients with HF. The study is limited by a short follow up period and long-term follow-up is required before definitive conclusions can be made.

Remote monitoring of cardiac implantable electronic devices (CIEDs) has become routine practice as a result of the advances in biomedical engineering, the advent of interconnectivity between the devices through the Internet, and the demonstrated improvement in patient outcomes, survival, and hospitalizations. However, this increased dependency on the Internet of Things comes with risks in the form of cybersecurity lapses and possible attacks. Although no cyberattack leading to patient harm has been reported to date, the threat is real and has been demonstrated in research laboratory scenarios and echoed in patient concerns. The CIED universe comprises a complex interplay of devices, connectivity protocols, and sensitive information flow between the devices and the central cloud server. Various manufacturers use proprietary software and black-box connectivity protocols that are susceptible to hacking. Here we discuss the fundamentals of the CIED ecosystem, the potential security vulnerabilities, a historical overview of such vulnerabilities reported in the literature, and recommendations for improving the security of the CIED ecosystem and patient safety.

Orthotopic heart transplantation is the most effective long-term therapy for end-stage heart disease. Denervation with the loss of autonomic modulation, vasculopathy, utilization of immunosuppressant drugs, and allograft rejection may result in an increased prevalence of arrhythmias in transplanted hearts. We aim to describe the trends, distribution, and the clinical impact of arrhythmias in patients with transplanted hearts. We queried the National Inpatient Sample with administrative codes for cardiac transplant patients using procedure ICD-9-CM codes 37.5 and 33.6. Arrhythmias were extracted using validated ICD-9-CM codes. Statistical Analysis System (SAS) version 9.4 was used for analysis. There were a total of 30,020 hospitalizations of heart transplant recipients between 1999 and 2014 in the United States of which 1,6342 (54.4%) had an arrhythmia. The frequency of total arrhythmias increased from 53.6% (n=1,158) in 1999 to 67.3% (n=1,575) in 2014. Transplant patients with arrythmias was not associated with significantly higher inpatient mortality (7.72% vs 6.90%, P = 0.225). The most common arrythmia was atrial fibrillation ([AF]26.83%) followed by ventricular tachycardia (22.86%). Trends in mortality associated with arrhythmias following heart transplant has been decreasing from 12.3% in 1999 to 8.9% in 2014 (P = 0.04). Subgroup analysis of ventricular arrythmias (VA) following heart transplant were associated with increased mortality (8.61% vs 6.94%, P = 0.0229). Over half of patients develop 1 or more cardiac arrhythmia after heart transplant. There is an increasing secular trend in the frequency of arrhythmias post cardiac transplant with atrial fibrillation determined to be the most common arrhythmia.

Intracardiac echocardiography (ICE) use during catheter ablation of atrial fibrillation (AF) provides real-time information to guide transseptal access, for monitoring the ablation and recognition of pericardial bleed. We describe trends of ICE use, impact on complications, and its in-hospital outcomes. The national in-patient sample database was queried from 2001 to 2014 for diagnosis of AF based on ICD-9-CM 427.31 with a catheter ablation procedure code (37.34) in the same hospitalization and its associated complications. ICE was identified using ICD-9-CM procedure code (37.28). Statistical Analysis System (SAS) was used for analysis. There was an estimated total 299,152 patients who underwent AF ablation from 2001 to 2014 of which ICE was used in 46,688 (15.6%) patients. The use of ICE significantly increased from 0.08% in 2001 to 15.7% in 2014. In-hospital mortality was significantly lower in patients in whom ICE was used (0.11% vs 0.54%, p

Background Patients with cardiac amyloidosis (CA) have increased mortality, which can be explained in part by an increased risk of arrhythmias. The burden of arrhythmias in CA, their predictors, and impact on in‐hospital outcomes remains unclear. The role of implantable cardioverter‐defibrillators (ICD) in this population is also uncertain. Methods We queried the National Inpatient Sample (NIS) using ICD‐9‐CM codes 277.39 and 425.7 to identify CA. Twelve common arrhythmias were extracted using appropriate, validated ICD‐9‐CM codes. ICD implantation was identified using procedure ICD‐9 codes 37.94 to 37.98, 00.51 and 00.54. Results There were a total of 145,920 CA hospitalizations between 1999 and 2014 in the United States and 56,199 (38.5%) of them were associated with arrhythmias. The prevalence of arrhythmias remained relatively constant from 41.5% in 1999 to 40.2% in 2014. The most common arrhythmia was atrial fibrillation (25.4%). In‐patient mortality was significantly higher in CA patients with arrhythmias (10.4% vs 6.5%, P, Arrhythmias are common in patients with Cardiac amyloidosis with most common being atrial fibrillation. These are associated with worse in‐hospital outcomes, increased length of stay, and cost of hospitalization.

Electrophysiology (EP) procedures carry the risk of kidney injury due to contrast/hemodynamic fluctuations. We aim to evaluate the national epidemiology of acute kidney injury requiring dialysis (AKI-D) in patients undergoing EP procedures. Using the National Inpatient Sample, we included 2,747,605 adult hospitalizations undergoing invasive diagnostic EP procedures, ablation and implantable device placement from 2006 to 2014. We examined the temporal trend of AKI-D and outcomes associated with AKI-D. The rate of AKI-D increased significantly in both diagnostic/ablation group (8-21/10,000 hospitalizations from 2006 to 2014, P = 0.02) and implanted device group (19-44/10,000 hospitalizations from 2006 to 2014, P < 0.01), but it was explained by temporal changes in demographics and comorbidities. Cardiac resynchronization therapy and pacemaker placement had higher risk of AKI-D compared to implantable cardioverter-defibrillator placement (23 vs. 31 vs. 14/10,000 hospitalizations in cardiac resynchronization therapy, pacemaker placement, and implantable cardioverter-defibrillator group, respectively). Development of AKI-D was associated with significant increase in in-hospital mortality (adjusted odds ratio, 9.6 in diagnostic/ablation group, P < 0.01; adjusted odds ratio, 5.1 in device implantation group, P < 0.01) and with longer length of stay (22.5 vs. 4.5 days in diagnostic/ablation group, 21.1 vs. 5.7 days in implanted device group) and higher cost (282,775 vs. 94,076 USD in diagnostic/ablation group, 295,660 vs. 102,007 USD in implanted device group). The incidence of AKI-D after EP procedures increased over time but largely explained by the change of demographics and comorbidities. This increasing trend, however, was associated with significant increase in resource utilization and in-hospital mortality in these patients.

65-year-old man with a history of coronary artery disease s/p percutaneous coronary intervention to the left anterior descending artery and atrial fibrillation s/p recent (3 months) pulmonary vein isolation presented to the emergency department with symptoms of palpitations for 1 day after admittedly forgetting to take his medications found to be in a wide complex tachycardia. We discuss a stepwise approach using properties of the conduction system to diagnose the patient's tachycardia.

27-year-old male with incessant palpitations and reduced ejection fraction presents for diagnostic electrophysiology study. ECG shows a long RP tachycardia. Permanent junctional reciprocating tachycardia is diagnosed on EP study with successful ablation of posteroseptal accessory pathway.

Heart transplantation is the most effective long-term therapy for end-stage heart disease. There is limited data related to sudden cardiac arrest (SCA) in postheart transplant recipients. We aimed to describe the trends, and rate of SCA following heart transplantation and thereby identify clinical predictors as well as outcomes of SCA in patients post-transplant. We queried the National Inpatient Sample (NIS) with administrative codes for SCA and heart transplant. We assessed baseline differences between SCA and non-SCA admissions, with hazard ratios adjusted for age, gender, CCI, and race. Multivariable logistic regression models were generated to identify the independent predictors for SCA. There was a total of 30,020 hospitalizations of heart transplant recipients between 1999 and 2014 in the United States and among these 1,953 patients (6.5%) suffered SCA with an increasing trend of admissions for SCA. Among the patients who suffered from SCA, 18.83% died during the same hospitalization, 19.29% were discharged to a long-term facility, and 61.38% were discharged home. Multivariate analysis demonstrated that conduction system disorders (Hazard ratio [95% confidence interval]; 7.1 [4.5-11.1]), female gender (HR:1.2 [1.1-1.3]), diabetes (HR:1.4 [1.2-1.6]), and hypertension (HR:1.2 [1.1-1.4]) were the strongest predictors for SCA. SCA hospitalizations occur in 6.5% of patients post cardiac transplant and have been increasing from 1999 to 2014. Conduction block, graft rejection, female gender, hypertension, diabetes are independent predictors for SCA in heart transplant recipients.

Cardiac sarcoidosis is a component of an often multiorgan granulomatous disease of still uncertain cause. It is being recognized with increasing frequency, mainly as the result of heightened awareness and new diagnostic tests, specifically cardiac magnetic resonance imaging and18F-fluorodeoxyglucose positron emission tomography scans. The purpose of this case-based review is to highlight the potentially life-saving importance of making the early diagnosis of cardiac sarcoidosis using these new tools and to provide a framework for the optimal care of patients with this disease. We will review disease mechanisms as currently understood, associated arrhythmias including conduction abnormalities, and atrial and ventricular tachyarrhythmias, guideline-directed diagnostic criteria, screening of patients with extracardiac sarcoidosis, and the use of pacemakers and defibrillators in this setting. Treatment options, including those related to heart failure, and those which may help clarify disease mechanisms are included.

Objectives The present study investigated whether regional anesthetic techniques, especially truncal blocks, can provide adjunct anesthesia without the additional risk of general anesthesia and neuraxial techniques for subcutaneous implantable cardioverter-defibrillator (S-ICD) implantation. Design Single-center, prospective, randomized study. Setting Holding area and operating room at a single-center tertiary care hospital. Participants The study comprised 22 American Society of Anesthesiologists (ASA) physical status 3 or 4 patients with severe cardiac disease undergoing S-ICD implantation. Interventions Patients received either a combination of serratus anterior plane block and transversus thoracis plane block or surgical infiltration of local anesthetics. Measurements and Main Results Perioperative analgesic medication in the fascial plane block group versus the surgical wound infiltration group, visual analog pain scale score (0-10), intraoperative vital signs, total procedure time, and length of stay in the intensive care unit were measured. Total intraoperative fentanyl requirements (µg) were significantly less in the truncal block group versus the surgical infiltration group (45 [25-50] v 90 [50-100]; p = 0.026), and no patients had any adverse sequelae related to the study. Median intraoperative propofol use in the surgical infiltration group was 66.48 (47.30-73.73) µg/kg/min, and 65.95 (51.86-104.86) µg/kg/min for the truncal block group. This difference between the groups was not statistically significant (p = 0.293). Conclusions The performance of both the serratus anterior plane block and transversus thoracis plane blocks for S-ICD implantation are appropriate and may have the benefit of decreasing intraoperative opioid requirements.

Background Cardiac amyloidosis (CA) remains an underdiagnosed entity. Atrial fibrillation (AF) is common in patients with CA, likely owing to direct amyloid deposition in the left atrium. However, the prevalence of AF in CA and its association with in-hospital outcomes has not been studied in large populations. Purpose Our aim was to study the trends, baseline characteristics, and clinical impact of AF in patients with CA in the United States using the Healthcare Cost and Utilization Project (HCUP) National) Inpatient Sample (NIS) from 1999 to 2014. Methods We queried the NIS and identified CA using ICD-9-CM codes 277.39 and 425.7. AF in CA patients was identified using the ICD-9-CM code of 427.31. Statistical Analysis System (SAS) 9.4 was used for analysis of data. Results There were a total of 145,920 CA hospitalizations between 1999 and 2014 in the United States, of which 37,070 (25.4%) had AF. The prevalence of AF remained consistent from 27.5% in 1999 to 27.4% in 2014. The mean age of patients with AF was 72.9±28.2 years and for patients without AF was 67±31.9 years (p Inpatient mortality was significantly higher in CA patients with AF (10.4% vs 6.5%, p There was no significant difference between CA patients with and without AF in mean cost of hospitalization ($58222±10752 vs $57695±545, p=0.081) or length of stay (7.9±0.1 vs 7.7±0.1 days, p=0.7089). Conclusion CA with atrial fibrillation is a well-recognized entity, and our large scale retrospective analysis found significant association with worse in-hospital outcomes and cardiogenic shock. Interestingly, trend of in-patient mortality in CA has been decreasing over the years, likely owing to improved imaging modalities for diagnosis. Optimal management of AF in CA is imperative to improve outcomes in this population. Funding Acknowledgement Type of funding source: None

Background Orthotopic heart transplantation is the most effective long-term therapy for end-stage heart disease. Denervation of transplanted heart with the loss of autonomic modulation, vasculopathy, utilization of immunosuppressant drugs, and risk of allograft rejection may result in change in the prevalence of arrhythmias in transplanted hearts. Purpose To describe the trends, distribution and the clinical impact of arrhythmias in transplanted hearts in a large nationwide population. Methods We queried the National Inpatient Sample with administrative codes. Cardiac transplant patients were identified using procedure ICD-9-CM codes 37.5 and 33.6. Common arrhythmias were extracted using appropriate validated ICD-9-CM codes. Statistical Analysis System (SAS) version 9.4 was used for analysis of data. Results There was a total of 30,020 hospitalizations of heart transplant recipients between 1999 and 2014 in the United States and 16342 (54.4%) of these had arrhythmias. The prevalence of total arrhythmias increased from 53.6% (n=1,158) in 1999 to 67.3% (n=1,575) in 2014. The most common arrhythmia was atrial fibrillation (26.83%) followed by ventricular tachycardia (22.86%) and the prevalence of individual arrhythmias is as shown in Figure 1. Cardiogenic shock was higher in transplanted hearts with arrhythmias when compared with patients without arrhythmias (25.96% vs 18.18%; p The total hospital cost when adjusted for inflation was significantly higher in the arrhythmic patients, with an average cost of about $570,415±9,590 vs $439,707±8362 in patients without arrhythmias (p Conclusion A significant proportion of patients with heart transplant have cardiac arrhythmias and are associated with worse in-hospital outcomes of cardiogenic shock, increased length of stay, and cost of hospitalization. However, they are not associated with worse inpatient mortality. Funding Acknowledgement Type of funding source: None

Intracardiac echocardiography (ICE) use during catheter ablation of atrial fibrillation (AF) provides real-time information to guide transseptal access, for monitoring the ablation and recognition of pericardial bleed. We describe trends of ICE use, impact on complications, and its in-hospital outcomes.The national in-patient sample database was queried from 2001 to 2014 for diagnosis of AF based on ICD-9-CM 427.31 with a catheter ablation procedure code (37.34) in the same hospitalization and its associated complications. ICE was identified using ICD-9-CM procedure code (37.28). Statistical Analysis System (SAS) was used for analysis.There was an estimated total 299,152 patients who underwent AF ablation from 2001 to 2014 of which ICE was used in 46,688 (15.6%) patients. The use of ICE significantly increased from 0.08% in 2001 to 15.7% in 2014. In-hospital mortality was significantly lower in patients in whom ICE was used (0.11% vs 0.54%, p 0.0001). Complications were 52% lower in procedures using ICE vs without ICE (HR [95%CI]; 0.48 [0.44-0.51]). The rate of cardiac complications was also lower in ICE users (3.67% vs 4.51%; p = 0.025). The use of ICE during AF ablation resulted in significantly higher cost of hospitalization ($98,436 ± 597 vs $81,300 ± 310; p 0.0001), but this was offset by a decreased length of hospital stay (2.1 ± 0.02 vs 4 ± 0.02 days; p 0.0001).The use of ICE during AF ablation has increased over the years and is associated with lower in-hospital mortality and procedural complications, shorter LOS but an increased cost of hospitalization.

Key Clinical Message Inappropriate shock due to residual air in subcutaneous implantable cardiac defibrillators is not a well-known complication. Obtaining overpenetrated X-rays, recognizing electrocardiogram findings, limiting blunt finger dissection, and switching to sense at another vector are techniques which might lead to avoidance of unnecessary wound exploration or device removal.

The atrioventricular node (AV) is considered the electrical connection between the atria and ventricles. There is an electrical pause between activation of the atria and the ventricles (PR segment), but to date the mechanism responsible for this interruption remains unclear. The present communication focuses on the hypothesis that magnetic field dynamics could provide the answer. Proof of this hypothesis is that in Wolff-Parkinson-White syndrome, where there is physical connection between the atria and ventricles (bundle of Kent), there is electrical AV continuity, no PR segment is detected, and catheter ablation of the abnormal bundle restores AV discontinuity. Spontaneous initiation of the heart at the level of the sinus node, the pacemaker of the heart, could also be explained via field dynamics. The known transmembrane pacemaker protein CHN4, present in both sinoatrial and AV nodal cells, could interact with field information to provide specificity in an electronic key-to-lock mechanism interaction.

Epstein-Barr Virus (EBV) can rarely cause myocarditis. Conduction abnormalities such as complete heart block (CHB) may be the initial presentation. Serology for EBV should be included in the workup of myocarditis with conduction abnormalities. An immunocompetent, 20 year-old woman with 3 days of

Cardiac sarcoidosis (CS) is highly underdiagnosed due to its often silent course. Sudden cardiac death (SCD) is a devastating and often index manifestation of cardiac involvement. In this study, we analyze the possible predictors of SCD in CS. We queried the National Inpatient Sample between 1999

Ventricular arrhythmias are common in patients with cardiac amyloidosis (CA) and are associated with increased mortality. The role of implantable cardiac defibrillator (ICD) in this population however remains unclear. We queried the National Inpatient Sample between 1999 and 2014 and CA was defined

Patients with cardiac amyloidosis (CA) have increased mortality, which can be explained in part by increased risk of arrhythmias. However, the burden of arrhythmias in CA, their predictors and impact on in-hospital outcomes is unclear. We queried the National Inpatient Sample and CA was identified

Left atrial appendage occlusion (LAAO) has emerged as an important stroke prevention therapy for atrial fibrillation (AF) patient in recent years. Despite increasing attentions to the long-term efficacy, little data is available about its 30-day readmission. Index admissions and 30-day readmissions

Intracardiac echocardiography (ICE) during atrial fibrillation (AF) ablation offers real time information to guide transseptal access, monitoring the lesion and recognition of pericardial bleed. We describe the trends in the use of ICE and its impact on in-hospital outcomes and complications.

Surgical site bleeding and infection are potential complications after electrophysiology (EP) device implantation procedures. To date, there is a wide variety of tools for management of intraoperative bleeding but it still remains unclear what methods are preferred.The aim of our study is to compare the rate of complications in patients who underwent cardiac implantable electronic device (CIED) implantation utilizing MPH hemostatic powder to the rate of complications in those patients who underwent standard procedure protocol without MPH hemostatic powder.In our study, a new plant-derived microporous polysaccharide hemostatic powder (Arista) was used. A total of 283 consecutive patients were retrospectively studied to assess the rate of complications in patients who underwent CIED implantation with MPH hemostatic powder (n = 77, MPH hemostatic powder) and without (n = 206, no MPH hemostatic powder). Patients were followed for 12 months.The MPH hemostatic powder group of patients had a lower complication rate when compared to no MPH hemostatic powder, 0.3% vs. 1.7% (p .05), respectively. The rate of device implantation site MPH hematoma in the MPH hemostatic powder group was 0.4%, versus 0.9% in the other group. There were no postoperative infections in the MPH hemostatic powder group versus 3.2% infections in the other group. The main predictor of increased risk of post-procedural complication was the usage of anticoagulation with a hazard ration of 2.7.Using MPH hemostatic powder for post-procedural hemostasis was shown to result in a significant reduction in the rate of overall post-procedural complications (a composite endpoint of hematoma and infections), and a trend in reduction of the infections rates and device implantation site hematoma rates.

Introduction: Atrial Fibrillation and Flutter (AF) predispose patients to acute ischemic strokes and increased mortality. We aim to assess the impact of new guidelines, innovations in technology and several new drugs on mortality and morbidity of patients hospitalized for ischemic stroke with concurrent AF over 10 years. We assessed the hypothesis that these advances would be associated with improvements in mortality over that time period. Methods: This is a retrospective cohort study using the 2004-2014 National Inpatient Sample, the largest publicly available inpatient database in the United States. We included women and men >18 years of age admitted between 2004 and 2014 with primary diagnoses of atrial fibrillation or flutter and with secondary diagnoses of acute ischemic stroke and transient ischemic attack (using ICD-9 CM codes). The primary outcome was in-hospital mortality and the secondary outcomes were total hospital cost and mean length of stay (LOS). STATA 13.0 was used for data analysis. Results: 222,074 patients were included in this study. The mean age was 79.2 years and 58.8% were female. The inpatient mortality rate in 2004 was 11.6% and it decreased consistently until 2014 at 8.0% (p trend Conclusion: Over the past 10 years, new innovations in technology and the approval and use of several novel oral anticoagulants for use in AF have been implemented. While there is a trend of increasing costs, these measures seem to show a trend of improving mortality and decreasing length of stay in patients hospitalized with ischemic strokes and AF.

Ablation of Atrial Arrhythmias in Cardiac Sarcoidosis Background We previously reported on the incidence and clinical implications of supraventricular arrhythmia in patients with cardiac sarcoidosis (CS). The role of catheter ablation for the management of atrial arrhythmia (AA) in this patient population is unknown. Methods and Results One hundred consecutive patients with CS were monitored for the incidence of supraventricular arrhythmias. Those with persistent symptoms despite optimal medical therapy proceeded to catheter ablation. Following ablation, all patients were followed serially with Holter monitoring or device interrogation. Thirty-two (32%) patients had symptomatic supraventricular arrhythmias. Nine (28%) patients had symptomatic AA requiring catheter ablation for clinical indications. Mean age was 55 ± 11.6 years. Five (56%) patients had atrial fibrillation (AF), of whom 2 also had cavotricuspid isthmus ablation. Four patients had isolated atrial flutter: 2 patients with left atrial flutter, and 2 patients with cavotricuspid flutter. All other arrhythmias were ablated in the left atrium. Mean duration of follow-up was 1.8 ± 1.9 years. One patient with atypical atrial flutter, and one patient with AF have had recurrence; the remaining patients remain in sinus rhythm. Conclusions Our study suggests that AA in CS is frequently left atrial in origin. Catheter ablation appears to be effective and safe for the maintenance of sinus rhythm in patients with CS.

Methadone is used for the treatment of opioid addiction and for treatment of chronic pain. The safety of methadone has been called into question by data indicating a large increase in the number of methadone-associated overdose deaths in recent years that has occurred in parallel with a dramatic rise in the use of methadone for chronic pain. The American Pain Society and the Col- lege on Problems of Drug Dependence, in collaboration with the Heart Rhythm Society, commis- sioned an interdisciplinary expert panel to develop a clinical practice guideline on safer prescribing of methadone for treatment of opioid addiction and chronic pain. As part of the guideline develop- ment process, the American Pain Society commissioned a systematic review of various aspects related

Background Cardiac sarcoidosis (CS) is known to be associated with congestive heart failure, conduction disorders, and tachyarrhythmias. Ventricular arrhythmias are the most feared cardiac manifestation because they often are unpredictable, may be the first manifestation of the disease, and may be fatal. The propensity for the development of supraventricular arrhythmias (SVAs) in patients with CS has not been described. The aim of this study was to assess the prevalence as well as the predictors of SVA. Methods We retrospectively investigated 100 patients with biopsy specimen-proven systemic sarcoidosis and evidence of cardiac involvement (defined by cardiac biopsy specimen, PET scan, or cardiac MRI). The mean follow-up was 5.8 ± 3.6 years. ECG, Holter monitoring, implantable cardioverter defibrillator interrogations, or electrophysiology studies were used to document SVA. Echocardiographic data, demographics, and extracardiac involvement were recorded, and univariate and Poisson regressions were performed to compare characteristics of patients with and without documented SVA. Results The prevalence of SVA was 32%, and atrial fibrillation was the most common arrhythmia, comprising 18% of the total burden, followed by atrial tachycardias (7%), atrial flutter (5%), and other supraventricular tachycardias (2%). Of the patients with SVA, 96% were symptomatic. Left atrial enlargement (LAE) was more frequent in the group with SVA, with an incidence of 267.8 per 1,000 person-years, and it significantly increased the likelihood of SVA on multivariate analysis (risk ratio, 6.12; 95% CI, 2.19-17.11). Diastolic dysfunction, systemic hypertension, and right atrial enlargement were predictors of SVA on univariate analysis. Left ventricular hypertrophy, right ventricular dysfunction, tricuspid valve disease, pulmonary hypertension, and pulmonary sarcoidosis were not associated with SVA on univariate analysis. Conclusions The study systematically evaluated the frequency of SVA in a large number of patients with CS. SVA in patients with CS is frequent and associated with symptoms. LAE was clearly associated with the development of SVA in this patient population. The extent to which LAE predicts the occurrence of SVA in larger, more diverse CS populations should be evaluated prospectively.

Background— Cardiac involvement in sarcoidosis is often silent and may lead to sudden death. This study was designed to assess the value of programmed electric stimulation of the ventricle (PES) for risk stratification in patients with sarcoidosis and evidence of preclinical cardiac involvement on imaging studies. Methods and Results— Patients with biopsy-proven systemic sarcoidosis but without cardiac symptoms who had evidence of cardiac sarcoidosis on positron emission tomography (PET) or cardiac MRI (CMR) were included. All patients underwent baseline evaluation, echocardiographic assessment of left ventricular function, and programmed electric stimulation of the ventricle. Patients were followed for survival and arrhythmic events. Seventy-six patients underwent PES of the ventricle. Eight (11%) were inducible for sustained ventricular arrhythmias and received an implantable defibrillator. None of the noninducible patients received a defibrillator. Left ventricular ejection fraction was lower in patients with inducible ventricular arrhythmia (36.4±4.2% versus 55.8±1.5%, P P Conclusions— In patients with biopsy-proven sarcoidosis and evidence of cardiac involvement on PET or CMR alone, positive PES may help to identify patients at risk for ventricular arrhythmia. More importantly, patients in this cohort with a negative PES appear to have a benign course within the first several years following diagnosis. PES may help to guide the use of implantable cardioverter defibrillators in this population.

Periprocedural thromboembolic and hemorrhagic events are complications of percutaneous radiofrequency catheter ablation (RFA) of atrial fibrillation (AF). The management of anticoagulation before and after RFA could play an important role in the prevention of these complications. The incidence of thromboembolic events varies from 1% to 5%, depending on the ablation and the anticoagulation strategy used in the periprocedural period. The scientific evidence behind the management of anticoagulation in patients with AF undergoing RFA is scarce and is mostly based on small studies and experts' consensus. It remains unclear whether catheter ablation for AF reduces the risk of stroke and obviates the need for anticoagulation after the procedure. Limited data are available regarding the risk of thromboembolism with and without warfarin after AF ablation. In this review we will review the most current evidence supporting the different strategies to reduce thromboembolic risk before, during, and after catheter ablation for AF.

Women with atrial fibrillation (AF) have more symptoms and poorer quality of life when compared with men. Data are lacking on sex differences in catheter ablation and outcomes of AF in younger adults. This was a retrospective cohort study using the 2005 to 2014 National Inpatient Sample databases

The incidence of non-alcoholic fatty liver disease (NAFLD) has been rising partly in consequence to the rising obesity epidemic. Previous studies support the link between NAFLD and the onset of atrial fibrillation (AF). We aim to assess the impact of NAFLD on patients with AF, as data is limited on

Studies suggest patients with atrial fibrillation (AF) who also suffer from obstructive sleep apnea (OSA) might have a different response to ablative procedures. It has been hypothesized that AF substrates and pathophysiology in these patients might be different from patients with primary AF. Data

Chronic obstructive pulmonary disease (COPD) has been found to be independently associated with atrial fibrillation (AF). We aim to assess the impact of COPD on patients with AF, as data is limited on the effects of co-existence of these two conditions on inpatient mortality, length of stay (LOS)

Obesity is a predictor of worse outcomes in many cardiovascular diseases but studies suggest an obesity paradox exists in patients with heart failure, hypertension, peripheral vascular disease, and coronary artery disease. Obesity has been linked to increased incidence of atrial fibrillation (AF) as