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Your search keyword '"Afzal, Muhammad"' showing total 16 results
Start Over Author "Afzal, Muhammad" Publication Year Range Last 10 years Journal journal of cardiovascular electrophysiology
16 results on '"Afzal, Muhammad"'

1. Direct current cardioversion practices following percutaneous left atrial appendage closure

Author

Bhuta, Sapan, primary, Shaaban, Adnan, additional, Binda, Nkongho C., additional, Antaki, James, additional, Augostini, Ralph S., additional, Kalbfleisch, Steven J., additional, Savona, Salvatore J., additional, Okabe, Toshimasa, additional, Houmsse, Mahmoud, additional, Afzal, Muhammad R., additional, Daoud, Emile G., additional, and Hummel, John D., additional

Published
2023
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2. Novel algorithms improve arrhythmia detection accuracy in insertable cardiac monitors.

Author

Gopinathannair, Rakesh, Shehata, Michael M., Afzal, Muhammad R., Manyam, Harish, Qu, Fujian, Badie, Nima, Dawoud, Fady, Ryu, Kyungmoo, Katcher, Michael S., and Lakkireddy, Dhanunjaya

Subjects
TACHYCARDIA diagnosis, ATRIAL fibrillation diagnosis, AMBULATORY electrocardiography, SYNCOPE, PATIENT monitoring, CARDIAC pacing, COMPARATIVE studies, CARDIAC arrest, DESCRIPTIVE statistics, QUALITY assurance, RESEARCH funding, DIAGNOSTIC errors, ALGORITHMS, EARLY diagnosis, PATIENT safety
Abstract

Introduction: Insertable cardiac monitors (ICMs) are commonly used to diagnose cardiac arrhythmias. False detections in the latest ICM systems remain an issue, primarily due to inaccurate R‐wave sensing. New discrimination algorithms were developed and tested to reduce false detections of atrial fibrillation (AF), pause, and tachycardia episodes in ICMs. Methods: Stored electrograms (EGMs) of AF, pause, and tachycardia episodes detected by Abbott Confirm Rx™ ICMs were extracted from the Merlin.net™ Patient Care Network, and manually adjudicated to establish independent training and testing datasets. New discrimination algorithms were developed to reject false episodes due to inaccurate R‐wave sensing, P‐wave identification, and R–R interval patterns. The performance of these new algorithms was quantified by false positive reduction (FPR) and true positive maintenance (TPM), relative to the existing algorithms. Results: The new AF detection algorithm was trained on 5911 EGMs from 744 devices, resulting in 66.9% FPR and 97.8% TPM. In the testing data set of 1354 EGMs from 119 devices, this algorithm achieved 45.8% FPR and 97.0% TPM. The new pause algorithm was trained on 7178 EGMs from 1490 devices, resulting in 70.9% FPR and 98.7% TPM. In the testing data set of 1442 EGMs from 340 devices, this algorithm achieved 74.4% FPR and 99.3% TPM. The new tachycardia algorithm was trained on 520 EGMs from 204 devices, resulting in 57.0% FPR and 96.6% TPM. In the testing data set of 459 EGMs from 237 devices, this algorithm achieved 57.9% FPR and 96.5% TPM. Conclusion: The new algorithms substantially reduced false AF, pause, and tachycardia episodes while maintaining the majority of true arrhythmia episodes detected by the Abbott ICM algorithms that exist today. Implementing these algorithms in the next‐generation ICM systems may lead to improved detection accuracy, in‐clinic efficiency, and device battery longevity. [ABSTRACT FROM AUTHOR]

Published
2023
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5. A 10 J shock impedance in sinus rhythm correlates with a 65 J defibrillation impedance during subcutaneous defibrillator implantation using an intermuscular technique

Author

Okabe, Toshimasa, primary, Savona, Salvatore J., additional, Matto, Faisal, additional, Ward, Chad, additional, Singh, Prabhpreet, additional, Afzal, Muhammad R., additional, Kalbfleisch, Steven J., additional, Weiss, Raul, additional, Houmsse, Mahmoud, additional, Augostini, Ralph S., additional, Hummel, John D., additional, and Daoud, Emile G., additional

Published
2021
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9. Incidence of pacing‐induced cardiomyopathy in pacemaker‐dependent patients is lower with leadless pacemakers compared to transvenous pacemakers

Author

Sanchez, Reynaldo, primary, Nadkarni, Anish, additional, Buck, Benjamin, additional, Daoud, Georges, additional, Koppert, Tanner, additional, Okabe, Toshimasa, additional, Houmsse, Mahmoud, additional, Weiss, Raul, additional, Augostini, Ralph, additional, Hummel, John D., additional, Kalbfleisch, Steven, additional, Daoud, Emile G., additional, and Afzal, Muhammad R., additional

Published
2020
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10. Implantation of leadless pacemakers via inferior vena cava filters is feasible and safe: Insights from a multicenter experience

Author

Houmsse, Mahmoud, primary, Karki, Roshan, additional, Gabriels, James, additional, Reinig, Michael, additional, Patel, Dilesh, additional, Hussain, Sarah K., additional, Gandhi, Gaurang D., additional, Lloyd, Michael S., additional, Makary, Mina S., additional, Okabe, Toshimasa, additional, Tamirisa, Kamala, additional, Joza, Jacqueline, additional, Patel, Apoor, additional, Afzal, Muhammad R., additional, Epstein, Laurence M., additional, and Cha, Yong‐Mei, additional

Published
2020
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12. RIsk Stratification prior to lead Extraction and impact on major intraprocedural complications (RISE protocol)

Author

Afzal, Muhammad R., primary, Daoud, Emile G., additional, Matre, Nancy, additional, Shoben, Abigail, additional, Burnside, Melissa, additional, Gilliam, Courtney, additional, Pinkhas, Daniel, additional, Okabe, Toshimasa, additional, Tyler, Jaret, additional, Houmsse, Mahmoud, additional, Kalbfleisch, Steven S., additional, Crestanello, Juan A., additional, Turner, Katja, additional, Weiss, Raul, additional, Hummel, John D., additional, Love, Charles J., additional, and Augostini, Ralph S., additional

Published
2019
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13. How to implant a phrenic nerve stimulator for treatment of central sleep apnea?

Author

Augostini, Ralph S., primary, Afzal, Muhammad R., additional, Costanzo, Maria Rosa, additional, Westlund, Randy, additional, Stellbrink, Christoph, additional, Gutleben, Klaus, additional, Gupta, Sanjaya, additional, Saleem, Moeen, additional, Smith, Timothy W., additional, Peterson, Michael, additional, Drucker, Michael, additional, Merliss, Andrew, additional, Hayes, John, additional, Butter, Christen, additional, Hutchinson, Matthew, additional, and Jagielski, Dariusz, additional

Published
2019
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14. Incidence of pacing‐induced cardiomyopathy in pacemaker‐dependent patients is lower with leadless pacemakers compared to transvenous pacemakers.

Author

Sanchez, Reynaldo, Nadkarni, Anish, Buck, Benjamin, Daoud, Georges, Koppert, Tanner, Okabe, Toshimasa, Houmsse, Mahmoud, Weiss, Raul, Augostini, Ralph, Hummel, John D., Kalbfleisch, Steven, Daoud, Emile G., and Afzal, Muhammad R.

Subjects
ATRIOVENTRICULAR node, CARDIAC pacemakers, CARDIAC pacing, CATHETER ablation, ECHOCARDIOGRAPHY, MULTIVARIATE analysis, CARDIOMYOPATHIES, RISK assessment, ODDS ratio, VENTRICULAR ejection fraction, DISEASE risk factors
Abstract

Introduction: Frequent right AQ4ventricular pacing (≥40%) with a transvenous pacemaker (TVP) is associated with the risk of pacing‐induced cardiomyopathy (PICM). Leadless pacemakers (LPs) have distinct physical and mechanical differences from TVP. The risk of PICM with LP is not known. To identify incidence, predictors, and long‐term outcomes of PICM in LP and TVP patients. Methods: The study comprised all pacemaker‐dependent patients with LP or TVP who had left ventricular ejection fraction (LVEF) of ≥50 from 2014 to 2019. The incidence of PICM (≥10% LVEF drop) was assessed with an echocardiogram. Predictors for PICM were identified using multivariate analysis. Long‐term outcomes after cardiac resynchronization (CRT) were assessed in both groups. Results: A total of 131 patients with TVP and 67 with LP comprised the study. All patients in the TVP group and the majority in the LP group underwent atrioventricular node ablation. The mean follow‐up duration in TVP and LP groups was 592 ± 549 and 817 ± 600 days, respectively. A total of 18 (13.7%) patients in TVP and 2 (3%) in LP developed PICM after a median duration of 254 (interquartile range: 470) days. The incidence of PICM was significantly higher with TVP compared with LP (p =.02). TVP as pacing modality was a positive (odds ratio [OR]: 1.07) while age was negative (OR: 0.94) predictor for PICM on multivariable analysis. Both patients in LP and all except two in the TVP group responded to CRT. Conclusion: Incidence of PICM is significantly lower with LP compared with TVP in pacemaker‐dependent patients. Age and TVP as pacing modality were predictors for PICM. [ABSTRACT FROM AUTHOR]

Published
2021
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15. Feasibility of concomitant vacuum-assisted removal of lead-related vegetations and cardiac implantable electronic device extraction

Author

Godara, Hemant, primary, Jia, Kelly Qi, additional, Augostini, Ralph S., additional, Houmsse, Mahmoud, additional, Okabe, Toshimasa, additional, Hummel, John D., additional, Weiss, Raul, additional, Kalbfleisch, Steven J., additional, Afzal, Muhammad R., additional, Badin, Auroa, additional, Cavalcanti, Rafael, additional, Franco, Diego Alcivar, additional, Tyler, Jaret, additional, and Daoud, Emile G., additional

Published
2018
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16. Replacing warfarin with a novel oral anticoagulant: Risk of recurrent bleeding and stroke in patients with warfarin ineligible or failure in patients with atrial fibrillation (The ROAR study)

Author

Turagam, Mohit K., primary, Parikh, Valay, additional, Afzal, Muhammad R., additional, Gopinathannair, Rakesh, additional, Lavu, Madhav, additional, Kanmanthareddy, Arun, additional, Pillarisetti, Jayasree, additional, Reddy, Madhu, additional, Atkins, Donita, additional, Bommana, Sudharani, additional, Jaeger, Melissa, additional, Jeffery, Courtney, additional, Mohanty, Sanghamitra, additional, Santangeli, Pasquale, additional, Cheng, Jie, additional, Di Biase, Luigi, additional, Narasimhan, Calambur, additional, Natale, Andrea, additional, and Lakkireddy, Dhanunjaya, additional

Published
2017
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