Tehran Arrhythmia Center
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1 Tehran Arrhythmia Center
2 The Worst Scenario A 4 year old kid High heart rates first noted by parents at 20 months of age. Family physician detected rates as high as 220 bpm at that age. He was visited, treated and followed at two large referral hospitals.
3 An old ECG 4 Yr-old Kid
4 4 Yr-old Kid First echocardiogram was reported as enlarged LV sizes with good contraction and interpreted as cardiomyopathy with normal EF. Heart failure medications were prescribed. Repeat echocardiograms one year later were reported as LV dysfunction with moderate MR. Mitral repair surgery was performed at age 3 years, complicated by an apparently hypoxic brain damage. The child was mentally and physically retarded and unable to talk or walk.
5 4 Yr-old Kid He was referred by a pediatric cardiology fellow asking: Isn t it WPW?!
6 Hear Failure Survival Temporal Trends in Survival 5-yr mortality declined by 12% per decade. Levy et al. NEJM 2002, 347;1442
7 Heart Failure Mortality Framingham: 80% of men and 70% of women under age 65 will die within 8 years. REACH: The overall median survival 4.5 yrs for women vs. 3.7 yrs for men.
8 Arrhythmia-induced Cardiomyopathy First reported as an isolated case almost a century ago* Largely considered a rare cause of cardiac damage, however: Over the past few years there have been several publications that have established beyond a reasonable doubt that this condition is much more prevalent. Even more important is the fact that it is a reversible and curable cause of heart failure. *Gossage AM, Braxton Hicks JA. On auricular fibrillation. Q J Med 1913;6:
9 Mechanisms It can be seen in association with a variety of cardiac rhythm disorders: Atrial fibrillation Ectopic atrial tachycardia Atrial flutter Incisional atrial tachycardia PJRT JET WPW Ventricular tachycardia Isolated ventricular ectopies Pacing at fast rates PMT Thyrotoxicosis Glucagonoma
10 Pathophysiology LV dysfunction during the tachyarrhythmias has been attributed to myocardial stunning resulting from sustained fast ventricular rates. High energy myocardial stores have been shown to get depleted including diminished Na-K-ATPase activity and lower myocardial ATP and Phosphocreatine stores. Although the condition is typically reversible, it can return with a vengeance if the original clinical scenario is allowed to recur.
11 Animal Experiments In animal experiments, it has been observed as soon as 24 hours after rapid ventricular pacing. This deterioration continues for 3 5 weeks. Within 48 hours of cessation of pacing, impaired ventricular function is noted to improve and returns to normal by 1 2 weeks. It may not reverse completely in all cases. Tachycardia-Induced Cardiomyopathy: A Review of Literature. PACE 2005,
12 Atrial Fibrillation The most common cause of tachycardia-induced cardiomyopathy
13 AF & Heart Failure The relationship between atrial fibrillation and cardiomyopathy has been explored for several years. Atrial fibrillation itself may be the cause of tachycardia-related or tachycardiaworsened cardiomyopathy. An important finding in some studies is that cardiomyopathy with atrial fibrillation may occur even with apparently well controlled ventricular response rates. S. J. Asirvatham. J Cardiovasc Electrophysiol, Vol. 18, pp , 2007
14 DCM, AF and RVR Tehran Arrhythmia Center
15 Does not eliminate AF Effective in controlling ventricular rate AV node ablation Improves: QoL Exercise tolerance Left ventricular function No deleterious effect on survival Induces dyssynchrony itself
16 Pace and Ablate
17 AVN ablation and PPM Cons: Permanent Detrimental effects of RV pacing, especially if reduced LV function already Still have thromboembolic risk Continue to have loss of atrial contractile function
18 Biventricular Pacing Tehran Arrhythmia Center LV RV Tehran Arrhythmia Center
19 Biventricular Pacing Tehran Arrhythmia Center LV RV Tehran Arrhythmia Center
20 AV Junctional Ablation RF LV Tehran Arrhythmia Center RV Tehran Arrhythmia Center
21 Biventricular Pacing in AF Tehran Arrhythmia Center Tehran Arrhythmia Center
22 AVJ Ablation and CRT
23 Suitable for Ablate and pace AF with symptomatic rapid ventricular rate unresponsive to drug Rx, or when drug Rx not tolerated Patients with a bradycardia indication for pacing More suited to elderly (less requirement for generator changes and lead revision)
24 AF Ablation & Heart Failure We have data primarily from the AFFIRM and related studies that controlling the ventricular rate with continued anticoagulation is as good as or better than attempting to restore and maintain sinus rhythm. However, there are data from typically nonrandomized trials that the quality of patients lives, atrial function, and ventricular function improve and perhaps mortality is reduced when successful ablation for atrial fibrillation is performed.
25 Potentials inside Pulmonary Veins
26 AF ablation: LA/PV Geometry
27 PV Isolation
28 PV potentials disappearing during radiofrequency current application
29 Disappearance of PV Potentials
30 Termination of AF during Burn
31 Termination of AF during Burn
32 Termination of AF during Burn
33 Persistent Junctional Reciprocating Tachycardia (PJRT)
34 PJRT
35 Persistent Junctional Reciprocating Tachycardia
36 PJRT
37 Termination & Re-initiation
38 RF Ablation
39 Termination
40 Sinus Rhythm
41 Incessant Atrial Tachycardia
42 Incessant Atrial Tachycardia
43 Incessant Atrial Tachycardia
44 Intra-cardiac Recordings
45 Success Signal at High Crista
46 Termination during Burn
47 Sinus Rhythm
48 Incisional Atrial Tachycardia/ Flutter 46 yr old woman with repaired ASD, incessant AT leading to heart failure
49 Intracardiac Recordings
50 Line of Low Voltage Double Potentials
51 RF Lesions
52 Termination during Burn
53 A NEW SCENARIO PVC induced Cardiomyopathy
54 Isolated Benign PVCs
55 PVCs: Are they really benign? Isolated premature ventricular contractions (PVCs) are common and occur in patients with any form of structural heart and valvular disease as well as in normal hearts when they are usually considered benign. Frequent PVCs themselves sometimes can cause reversible LV dysfunction and PVC-induced cardiomyopathy.
56 Outflow Tract VT/PVCs
57 Frequent Ectopies
58 Frequent Ectopies At the first clinical encounter, patients often present with both PVCs and LV dysfunction, raising the question which condition came first. Factors associated with the risk to develop PVC-cardiomyopathy have been in the focus of intense investigations and include the PVC burden, duration of symptoms, QRS width, site of origin, and others. Cardiomyopathy-inducing premature ventricular contractions: Not all animals are equal? Heart Rhythm, Vol 9, No 9, September 2012
59 Success Site
60 Loss of Ectopies Tehran Arrhythmia Center
61 RFA for PVCs Several studies have shown the reversibility of LV dysfunction after ablation of PVCs. Can we use the results of this studies to make a case for targeting not just symptomatic but even asymptomatic PVCs in patients manifesting cardiomyopathy? Should patients with NICM that meet current guidelines for undergoing prophylactic ICD implant be screened/ablated for asymptomatic PVCs first? Sanjay Dixit, MD. Heart Rhythm 2007
62 AN EXTREME SCENARIO
63 13 year old girl with progressive dyspnea during the last four years Functional class III-IV LVEF 15-20% Frequent (almost incessant) ventricular arrhythmias Unresponsive to intensive heart failure therapy and several anti-arrhythmic drugs including a combination of Amiodarone and Mexiletine. Transplant candidate
64 Presenting ECG
65 ECG at Onset
66 Success signal
67 Termination
68 Final Results Now in FC I without anti-arrhythmic drugs, LVEF 45%
69 ANOTHER SCENARIO Tachycardia-Aggravated Cardiomyopathy
70 40 year-old man with progressive dyspnea, now FC IV, on transplant list Incessant ventricular ectopies and VT Marked LV enlargement and dysfunction, LVEF 15% Marked LV trabeculations (Non-compaction?) Frequent ectopies with normal LV function documented 11 years ago. RFA at that time had failed. Biventricular ICD implanted at another center, obviously not working with almost incessant VT.
71 ECG at Onset
72 Anterolateral LV
73 Disappearance of Ectopies during Burn
74 Post-RF Rhythm
75 Effective CRT Three years post-rfa, he is in FC I with LVEF of 30%
76 FINAL SCENARIO Heart Failure with a Wide QRS
77 Young girl with severe refractory heart failure admitted in an ICU and under intravenous inotropes LVEF 10% A several-year history of treatment with the diagnosis of asthma No history of palpitations or documented arrhythmias Transferred to our center for implantation of a biventricular device
78 DCM with wide QRS
79 Preexcitation
80 AVRT
81 Anteroseptal Area
82 Loss of Delta
83 Post RFA
84 Narrow QRS
85 At Least No Dyssynchrony! Pre RFA Post RFA
86 Conclusion When confronting a patient with heart failure and any kind of tachyarrhythmias incl. AF and uncontrolled ventricular rates Frequent ventricular ectopies think about: <Arrhythmia-induced Cardiomyopathy> or <Arrhythmia-aggravated Cardiomyopathy> There may be a cure available!
87 Tehran Arrhythmia Center
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