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Prevalence of arrhythmias during exercise stress testing in patients with hypertrophic cardiomyopathy
S I Drăgulescu1, O Brînzan, C Streian
1First Medical Clinic, Department of Cardiology, County Timişoara Hospital, Romania.
Insights
The exercise test effectively identifies hypertrophic cardiomyopathy patients at high risk for serious cardiac events. This non-invasive method helps predict dangerous arrhythmias in these individuals.
Area of Science:
- Cardiology
- Electrophysiology
Background:
- Hypertrophic cardiomyopathy (HCM) is a significant cause of sudden cardiac death.
- Identifying high-risk patients for morbid events is crucial for timely intervention.
Purpose of the Study:
- To evaluate the utility of submaximal exercise testing in identifying hypertrophic cardiomyopathy patients at high risk of morbid events.
- To assess the occurrence of arrhythmias during exercise in HCM patients.
Main Methods:
- Twenty-five patients with echocardiographic evidence of HCM were enrolled.
- All patients underwent submaximal exercise testing with electrocardiographic monitoring.
Main Results:
- Over 50% of patients developed ventricular arrhythmias during the test.
- Half of these patients exhibited multiform or repetitive premature ventricular depolarizations.
- Two patients experienced ventricular tachycardia.
Conclusions:
- Submaximal exercise testing is valuable for stratifying risk in hypertrophic cardiomyopathy patients.
- The test can identify individuals prone to developing severe arrhythmias and potentially life-threatening events.
Abstract:
To identify the patients with hypertrophic cardiomyopathy at high risk of morbid events we investigated 25 patients with echocardiographic evidence of hypertrophic cardiomyopathy. All the patients were subjected to submaximal exercise test under electrocardiographic monitoring. More than 50% of the patients developed ventricular arrhythmias, about half of them presenting multiform or repetitive premature ventricular depolarizations; two patients presented ventricular tachycardia. Our results suggest the value of exercise test in identifying the patients at high risk of developing severe arrhythmias.