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Programmed electrical stimulation in patients with hypertrophic cardiomyopathy.
K H Kuck1, K P Kunze, M Geiger
1Department of Cardiology, University Hospital Eppendorf, Hamburg, F.R.G.
Zeitschrift Fur Kardiologie
|January 1, 1987
Summary
Programmed electrical stimulation cannot reliably predict adverse events in hypertrophic cardiomyopathy patients. This diagnostic tool failed to differentiate between patients with a history of cardiac arrest, syncope, or those who were asymptomatic.
Area of Science:
- Cardiology
- Electrophysiology
Background:
- Hypertrophic cardiomyopathy (HCM) is a complex cardiac condition.
- Identifying patients at risk for life-threatening ventricular arrhythmias is crucial.
Purpose of the Study:
- To evaluate the efficacy of programmed electrical stimulation (PES) in stratifying risk in HCM patients.
- To determine if PES can distinguish between HCM patients with different clinical presentations.
Main Methods:
- Fifty-four HCM patients underwent programmed electrical stimulation.
- Patients were categorized into three groups: prior cardiac arrest, syncope, or asymptomatic.
- Atrial and ventricular stimulation protocols were used to induce arrhythmias.
Main Results:
- Ventricular arrhythmias were induced in 18 patients (33%).
- The type and incidence of induced arrhythmias did not differ significantly across the three patient groups.
- No significant differences were observed in electrocardiographic, echocardiographic, or hemodynamic data between groups.
Conclusions:
- Programmed electrical stimulation with up to two extrastimuli is not effective in differentiating HCM patients at risk for adverse events.
- Current PES protocols lack the sensitivity to stratify risk in HCM based on clinical history.