Related Experiment Videos
[Course and prognosis of primary hypertrophic cardiomyopathies]
Insights
Familial hypertrophic cardiomyopathy significantly impacts prognosis, with high-risk families experiencing poor outcomes. Echocardiography revealed left ventricular changes, but familial history was the key predictor of survival.
Area of Science:
- Cardiology
- Genetics
- Clinical Medicine
Context:
- Hypertrophic cardiomyopathy (HCM) is a primary cardiac disorder.
- Understanding long-term outcomes and prognostic factors is crucial for patient management.
Purpose:
- To investigate the clinical course and mortality in a cohort of patients with hypertrophic cardiomyopathy.
- To identify prognostic factors, particularly the role of familial history, in hypertrophic cardiomyopathy.
Summary:
- A 48-month follow-up of 33 hypertrophic cardiomyopathy patients revealed a 21% 5-year mortality rate, with no sudden deaths observed.
- Functional deterioration occurred in one-third of patients; echocardiography showed increased left ventricular diastolic diameter and septal thickness.
- Patients from high-risk familial HCM backgrounds had a significantly poorer prognosis, characterized by early mortality, conduction disturbances, and marked hypertrophy.
Impact:
- Identifies familial history as a critical independent prognostic factor in hypertrophic cardiomyopathy.
- Highlights the importance of electrocardiogram and echocardiogram findings in assessing risk within familial HCM.
- Informs clinical strategies for risk stratification and management of hypertrophic cardiomyopathy patients, especially those with a family history.
Abstract:
33 patients with hypertrophic cardiomyopathy were followed for a mean duration of 48 months. 29 of them were reviewed; 6 had died, including 4 with a familial form belonging to two different families. No cases of sudden death were observed. The mortality rate was 4 p. cent at 1 year, 11 p. cent at two years and 21 p. cent at 5 years. The clinical course was marked by a functional deterioration in one-third of cases and, on echocardiography, by an increase in the diastolic diameter of the left ventricle and in the thickness of the septum, independent of the clinical course. Subjects from "high risk" families have a very poor prognosis (4 deaths out of 7 patients at an average age of 25). These families present major conductive disturbances on the electrocardiogram and a very marked parietal hypertrophy on the echocardiogram. No other prognosis factor independent of the familial aspect was revealed.