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4. Prognostic model for atrial fibrillation after cardiac surgery: a UK cohort study

10. Worldwide trends in hypertension prevalence and progress in treatment and control from 1990 to 2019: a pooled analysis of 1201 population-representative studies with 104 million participants

11. Heterogeneous contributions of change in population distribution of body mass index to change in obesity and underweight

18. P6586Brugada syndrome risk stratification - Evaluation of clinical and ECG risk markers in a multicenter international primary prevention cohort

20. Temporal Trends Over a Decade of Defibrillator Therapy for Primary Prevention in Community Practice

21. P5773Atrial fibrillation catheter ablation in patients with hypertrophic cardiomyopathy: multi-centre experience and application of HCM-Risk SCD score to predict ablation outcome

22. P1151Structural remodeling and conduction velocity dynamics in the human left atrium: relationship with reentrant mechanisms sustaining atrial tachycardia and atrial fibrillation

26. 25First evidence that differences in the t-wave upslope of the body surface ECG reflect right to left dispersion of repolarization in the intact human heart

31. 1168Long-term outcomes after catheter ablation of ventricular tachycardia in patients with structural heart disease: a Multicentre UK Study

40. POSTERS (2)96CONTINUOUS VERSUS INTERMITTENT MONITORING FOR DETECTION OF SUBCLINICAL ATRIAL FIBRILLATION IN HIGH-RISK PATIENTS97HIGH DAY-TO-DAY INTRA-INDIVIDUAL REPRODUCIBILITY OF THE HEART RATE RESPONSE TO EXERCISE IN THE UK BIOBANK DATA98USE OF NOVEL GLOBAL ULTRASOUND IMAGING AND CONTINUEOUS DIPOLE DENSITY MAPPING TO GUIDE ABLATION IN MACRO-REENTRANT TACHYCARDIAS99ANTICOAGULATION AND THE RISK OF COMPLICATIONS IN PATIENTS UNDERGOING VT AND PVC ABLATION100NON-SUSTAINED VENTRICULAR TACHYCARDIA FREQUENTLY PRECEDES CARDIAC ARREST IN PATIENTS WITH BRUGADA SYNDROME101USING HIGH PRECISION HAEMODYNAMIC MEASUREMENTS TO ASSESS DIFFERENCES IN AV OPTIMUM BETWEEN DIFFERENT LEFT VENTRICULAR LEAD POSITIONS IN BIVENTRICULAR PACING102CAN WE PREDICT MEDIUM TERM MORTALITY FROM TRANSVENOUS LEAD EXTRACTION PRE-OPERATIVELY?103PREVENTION OF UNECESSARY ADMISSIONS IN ATRIAL FIBRILLATION104EPICARDIAL CATHETER ABLATION FOR VENTRICULAR TACHYCARDIA ON UNINTERRUPTED WARFARIN: A SAFE APPROACH?105HOW WELL DOES THE NATIONAL INSTITUTE OF CLINICAL EXCELLENCE (NICE) GUIDENCE ON TRANSIENT LOSS OF CONSCIOUSNESS (T-LoC) WORK IN A REAL WORLD? AN AUDIT OF THE SECOND STAGE SPECIALIST CARDIOVASCULAT ASSESSMENT AND DIAGNOSIS106DETECTION OF ATRIAL FIBRILLATION IN COMMUNITY LOCATIONS USING NOVEL TECHNOLOGY'S AS A METHOD OF STROKE PREVENTION IN THE OVER 65'S ASYMPTOMATIC POPULATION - SHOULD IT BECOME STANDARD PRACTISE?107HIGH-DOSE ISOPRENALINE INFUSION AS A METHOD OF INDUCTION OF ATRIAL FIBRILLATION: A MULTI-CENTRE, PLACEBO CONTROLLED CLINICAL TRIAL IN PATIENTS WITH VARYING ARRHYTHMIC RISK108PACEMAKER COMPLICATIONS IN A DISTRICT GENERAL HOSPITAL109CARDIAC RESYNCHRONISATION THERAPY: A TRADE-OFF BETWEEN LEFT VENTRICULAR VOLTAGE OUTPUT AND EJECTION FRACTION?110RAPID DETERIORATION IN LEFT VENTRICULAR FUNCTION AND ACUTE HEART FAILURE AFTER DUAL CHAMBER PACEMAKER INSERTION WITH RESOLUTION FOLLOWING BIVENTRICULAR PACING111LOCALLY PERSONALISED ATRIAL ELECTROPHYSIOLOGY MODELS FROM PENTARAY CATHETER MEASUREMENTS112EVALUATION OF SUBCUTANEOUS ICD VERSUS TRANSVENOUS ICD- A PROPENSITY MATCHED COST-EFFICACY ANALYSIS OF COMPLICATIONS & OUTCOMES113LOCALISING DRIVERS USING ORGANISATIONAL INDEX IN CONTACT MAPPING OF HUMAN PERSISTENT ATRIAL FIBRILLATION114RISK FACTORS FOR SUDDEN CARDIAC DEATH IN PAEDIATRIC HYPERTROPHIC CARDIOMYOPATHY: A SYSTEMATIC REVIEW AND META-ANALYSIS115EFFECT OF CATHETER STABILITY AND CONTACT FORCE ON VISITAG DENSITY DURING PULMONARY VEIN ISOLATION116HEPATIC CAPSULE ENHANCEMENT IS COMMONLY SEEN DURING MR-GUIDED ABLATION OF ATRIAL FLUTTER: A MECHANISTIC INSIGHT INTO PROCEDURAL PAIN117DOES HIGHER CONTACT FORCE IMPAIR LESION FORMATION AT THE CAVOTRICUSPID ISTHMUS? INSIGHTS FROM MR-GUIDED ABLATION OF ATRIAL FLUTTER118CLINICAL CHARACTERISATION OF A MALIGNANT SCN5A MUTATION IN CHILDHOOD119RADIOFREQUENCY ASSOCIATED VENTRICULAR FIBRILLATION120CONTRACTILE RESERVE EXPRESSED AS SYSTOLIC VELOCITY DOES NOT PREDICT RESPONSE TO CRT121DAY-CASE DEVICES - A RETROSPECTIVE STUDY USING PATIENT CODING DATA122PATIENTS UNDERGOING SVT ABLATION HAVE A HIGH INCIDENCE OF SECONDARY ARRHYTHMIA ON FOLLOW UP: IMPLICATIONS FOR PRE-PROCEDURE COUNSELLING123PROGNOSTIC ROLE OF HAEMOGLOBINN AND RED BLOOD CELL DITRIBUTION WIDTH IN PATIENTS WITH HEART FAILURE UNDERGOING CARDIAC RESYNCHRONIZATION THERAPY124REMOTE MONITORING AND FOLLOW UP DEVICES125A 20-YEAR, SINGLE-CENTRE EXPERIENCE OF IMPLANTABLE CARDIOVERTER DEFIBRILLATORS (ICD) IN CHILDREN: TIME TO CONSIDER THE SUBCUTANEOUS ICD?126EXPERIENCE OF MAGNETIC REASONANCE IMAGING (MEI) IN PATIENTS WITH MRI CONDITIONAL DEVICES127THE SINUS BRADYCARDIA SEEN IN ATHLETES IS NOT CAUSED BY ENHANCED VAGAL TONE BUT INSTEAD REFLECTS INTRINSIC CHANGES IN THE SINUS NODE REVEALED BY I (F) BLOCKADE128SUCCESSFUL DAY-CASE PACEMAKER IMPLANTATION - AN EIGHT YEAR SINGLE-CENTRE EXPERIENCE129LEFT VENTRICULAR INDEX MASS ASSOCIATED WITH ESC HYPERTROPHIC CARDIOMYOPATHY RISK SCORE IN PATIENTS WITH ICDs: A TERTIARY CENTRE HCM REGISTRY130A DGH EXPERIENCE OF DAY-CASE CARDIAC PACEMAKER IMPLANTATION131IS PRE-PROCEDURAL FASTING A NECESSITY FOR SAFE PACEMAKER IMPLANTATION?

41. MODERATED POSTERS (2)51GLOBAL HIGH DENSITY MAPPING OF RE-ENTRY VULNERABILITY INDEX INDENTIFIES SITES OF RIGHT VENTRICULAR ARRHYTHMIA INITIATION IN BRUGADA SYNDROME AND ARVC52THE ROLE OF ADENOSINE-GUIDED PULMONARY VEIN ISOLATION IN PATIENTS UNDERGOING ATRIAL FIBRILLATION ABLATION:AN UPDATED META-ANALYSIS53FIRST EVIDENT THAT T-PEAK AND TPEAK-TEND CORRELATE WITH RIGHT TO LEFT AND TRANSMURAL DYNAMIC DISPERSION OF REPOLARIZATION IN THE INTACT HUMAN HEART54RIPPLE MAPPING VENTRICULAR SCAR TO CHARACTERIZE CHANNELS SUPPORTING RE-ENTRANT TACHYCARDIA AS A GUIDE TO ABLATION55LONG TERM DURABILITY OF PULMONARY VEIN ISOLATION: INSIGHTS FROM A RANDOMISED TRIAL OF CRYOBALLOON VERSUS RADIOFREQUENCY ABLATION FOR A COMBINED APPROACH56A SINGLE-CENTRE EXPERIENCE OF THE CONVERGENT PROCEDURE FOR THE TREATMENT OF LONG-STANDING PERSISTENT ATRIAL FIBRILLATION57MODERATE SEDATION IN THE CARDIAC ELECTROPHYSIOLOGY LABORATORY: A RETROSPECTIVE ANALYSIS TO ASSESS SAFETY58USE OF GENERAL ANAESTHESIA IN CATHETER ABLATION OF PERSISTENT AF: IMPROVED OUTCOME AND COST EFFECTIVENESS

42. ORAL ABSTRACTS (2)EP & Ablation19CARDIAC ABLATION PATIENT REPORTED OUTCOMES MEASURES (PROMS): ANALYSIS OF POST-ABLATION AND 1 YEAR FOLLOW-UP DATA20INTENTIONAL CORONARY VEIN EXIT AND CARBON DIOXIDE INSUFFLATION TO ALLOW SAFE SUBXIPHOID EPICARDIAL ACCESS FOR VENTRICULAR MAPPING AND ABLATION - FIRST EXPERIENCE21PACED FRACTIONATION DETECTION AS A TOOL FOR MAPPING SCARS IN VT22DOES USE OF CONTACT-FORCE SENSING CATHETERS IMPROVE THE OUTCOME OF ABLATION OF VENTRICULAR TACHYCARDIA?23RETROGRADE AORTIC ACCESS OF THE PULMONARY VENOUS ATRIUM PROVIDES EQUIVALENT OUTCOMES TO RIGHT ATRIAL OR TRANSEPTAL ACCESS OF THE LEFT ATRIUM IN PATIENTS WITH CONGENITAL HEART DISEASE24COMPUTATIONAL THREE-DIMENSION LEFT ATRIAL APPENDAGE WALL THICKNESS MAPS AND HISTOLOGICAL ANALYSIS TO GUIDE LEFT ATRIAL APPENDAGE ELECTRICAL ISOLATIONPacing & Devices25IDENTIFYING THE OPTIMAL LOCATION FOR LV ENDOCARIDAL PACING:RESULTS FROM A MULTICENTRE INTERNATIONAL REGISTRY OF LV ENDOCARDIAL PACING26UK MULTI-CENTRE REGISTRY OF TRANSVENOUS LEAD EXTRACTION: CLINICAL OUTCOME USING TRACTION, CUTTING SHEATHS AND LASER TECHNIQUES27SKIN FISTULA FORMATION - A NEW EXPERIENCE WITH THE NEW TYRX ABSORBABLE ANTIMICROVIAL ENVELOPE28BIFOCAL RIGHT VENTRICULAR PACING IN PATIENTS WITH FAILED CORONARY-SINUS LEAD IMPLANTS: LONG-TERM RESULTS FROM MULTICENTRE REGISTRY29REAL TIME X-MRI GUIDED LEFT VENTRICULAR LEAD IMPLANTATION FOR TARGETED DELIVERY OF CARDIAC RESYNCHRONIZATION THERAPY30ACUTE AND CHRONIC PERFORMANCE OF COMMUNICATING LEADLESS ANTI-TACHYCARDIA PACEMAKER AND SUBCUTANEOUS IMPLANTABLE DEFIBRILLATOR

43. Outcomes after cryoablation vs. radiofrequency in patients with paroxysmal atrial fibrillation: impact of pulmonary veins anatomy

44. Allied Professionals7Screening for eligibility for subcutaneous icd implant in adults with congenital heart disease: how many patients are eligible?8Identifying the outcome of patients in a multispeciality nurse led rapid access blackout clinic undergoing implantable loop recorders for unexplained syncope9Implant of medtronic linq in an outpatient setting10Does time from diagnosis of atrial fibrillation to ablation effect success of catheter ablation?11Detection and management of atrial fibrillation in the pacing clinic12The efficacy of a nurse-led cardioversion service on clinical outcomes13Do major ion channels of pacemaker clock also play a role in atrioventricular nodal conduction in young and aged rats?14Anatomical and functional determinants of preferential rotor locations and stability in atrial fibrillation15Pacemaker-induced cardiomyopathy in the sheep: rva but not rvot pacing results in a heart failure cellular phenotype16A steep apd-restitution slope does not cause apd-alternans in the intact human heart17Cardiac sites of the in-vivo human heart exhibiting apd-alternans show changes in calcium-handling proteins and repolarizing currents18Dynamic transmural activation recovery interval gradients exceed apico-basal gradients in the intact human heart: Table

45. Posters 270Oversensing in subcutaneous implantable cardioverter-defibrillators71Early stimulation of the fast-conducting endocardium is the primary factor in reducing myocardial activation times for endocardial cardiac resynchronisation therap72The impact of age on outcomes in primary prevention icd recipients: a competing risks analysis73The effects of epicardial and endocardial pacing on the constituent waves of coronary flow: coronary resynchronisation74Manifestation of repolarisation and conduction abnormalities following exercise in concealed type 1 brugada75Delivering universal public access automated external defibrillators in the united kingdom: starting at the heart of the community76Under use of oral anticoagulation in new patients with atrial fibrillation: a clinical practice research datalink study77Complete extraction of abdominal pacing and icd leads- a unique case series78The impact of adjunctive complex fractionated atrial electrogram ablation and linear lesions on outcomes in persistent atrial fibrillation: a meta-analysis79Analysis of two novel risk calculators for the prediction of cardiac implantable electronic device infection80General anaesthesia improves the success rates of pulmonery vein isolation for paroxysmal atrial fibrillation ablation: Table 1

46. COVID-19 fever induced dynamic Brugada electrocardiogram

47. Comparison between radiofrequency with contact force-sensing and second-generation cryoballoon for paroxysmal atrial fibrillation catheter ablation: a multicentre European evaluation

49. Abstracts

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