Long-term follow-up of patients with obstructive hypertrophic cardiomyopathy treated with dual-chamber pacing

Introduction: The most common complication of alcohol septal ablation (ASA) is periprocedural high grade AV block (HGAVB). No long-term follow-up of cardiovascular implantable electronic device (CIED) utilization after ASA has been reported. Hypothesis: Pacemaker dependence on long-term follow up can be predicted by ECG or procedural characteristics. Methods: We analyzed all patients with hypertrophic cardiomyopathy who underwent ASA from December 1998 to December 2019 at our institution and received their first CIED within 30 days after ASA for HGAVB. All available follow-up interrogations were reviewed. CIED dependence was defined as ventricular pacing of ≥5%. CIED programming was determined by the patients’ cardiologists' discretion. Results: A total of 103 patients with hypertrophic cardiomyopathy underwent ASA. The average follow up duration was 10.1 years. Within 30 days after ASA, a total 25 patients received a CIED for HGAVB. On long term follow-up 16 patients (64%) were found to be CIED-dependent. Baseline characteristics, including pre and post-ASA ECG, were not significantly different between dependent and non-dependent patients (Table). The only predictor for CIED dependence was >1 ml of alcohol injected during ASA (OR 6.0, p<0.046). Conclusions: CIED implantation after ASA is common. Almost two thirds of patients who received CIED for postprocedural HGAVB were CIED-dependent on long term follow up. CIED dependence can be predicted by amount of injected alcohol >1 ml during ASA.

Download Full-text

Abstract 13943: Hypertrophic Cardiomyopathy with Left Ventricular Apical Aneurysm Represents a High-Risk Subgroup Necessitating Aggressive Preventive Therapy: A Long-term Follow-Up Study

Circulation ◽

10.1161/circ.130.suppl_2.13943 ◽

2014 ◽

Vol 130 (suppl_2) ◽

Author(s):

Ethan J Rowin ◽

Barry J Maron ◽

Tammy S Haas ◽

John R Lesser ◽

Mark S Link ◽

...

Keyword(s):

Heart Failure ◽

Hypertrophic Cardiomyopathy ◽

High Risk ◽

Sudden Death ◽

Left Ventricular ◽

Increased Risk ◽

Long Term Follow Up ◽

Apical Aneurysm

Background: Increasing penetration of high spatial resolution cardiovascular magnetic resonance (CMR) imaging into routine cardiovascular practice has resulted in more frequent identification of a subset of hypertrophic cardiomyopathy (HCM) patients with thin-walled, scarred left ventricular (LV) apical aneurysms. Prior experience involved relatively small numbers of patients with short follow-up and therefore the risk associated with this subgroup remains incompletely defined. Therefore, we assembled a large HCM cohort with LV apical aneurysms and long-term follow-up in order to clarify clinical course and prognosis. Methods and Results: Of 2,400 HCM patients, 60 (2.5%) were identified by CMR with LV apical aneurysm, 24 to 86 years of age, including 19 (32%) <45 years old; 70% male, and followed for 5.6 ± 3.5 years. Over the follow-up period, 24 patients experienced 31 adverse disease-related complications including: appropriate implantable cardioverter-defibrillator discharge for VT/VF (n=11), received or listed for heart transplant (n=6), heart failure death (n=5), nonfatal thromboembolic events (n=4), resuscitated out-of-hospital cardiac arrest (n=3), and sudden death (n=2). In addition, an intracavitary thrombus was identified in the apical aneurysm in 9 patients without a thromboembolic history. Combined HCM-related death and aborted life threatening event rate was 8.6% per year, nearly 6-fold greater than the 1.5% annual mortality rate reported in the general HCM population. Conclusions: Patients with LV apical aneurysms represent a high-risk subgroup within the diverse HCM spectrum, associated with substantial increased risk for disease-related morbidity and mortality, including advanced heart failure, thromboembolic stroke and sudden death. Identification of this unique HCM phenotype should prompt consideration for primary prevention ICD, and anticoagulation for stroke prophylaxis.

Download Full-text