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Hypertrophic cardiomyopathy.

Z Sasson1, H Rakowski, E D Wigle

  • 1University of Toronto, Ontario, Canada.

Cardiology Clinics
|May 1, 1988
PubMed
Summary
This summary is machine-generated.

Hypertrophic cardiomyopathy involves left ventricular hypertrophy, causing systolic outflow obstruction and diastolic dysfunction. Surgical or medical therapies can significantly improve symptoms in most affected patients.

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Area of Science:

  • Cardiology
  • Cardiovascular Disease
  • Genetics

Background:

  • Hypertrophic cardiomyopathy (HCM) is a primary disorder of the heart muscle.
  • It is characterized by unexplained left ventricular hypertrophy (LVH).
  • HCM presents diverse clinical and pathophysiologic features.

Purpose of the Study:

  • To describe the pathophysiology of hypertrophic cardiomyopathy.
  • To outline current therapeutic strategies for HCM.
  • To highlight recent advances in understanding and managing HCM.

Main Methods:

  • Review of clinical and pathophysiologic features of HCM.
  • Analysis of systolic anterior motion (SAM) and outflow obstruction.
  • Evaluation of diastolic dysfunction and arrhythmias.

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  • Assessment of surgical (ventriculomyectomy) and medical (calcium channel blockers) therapies.

    • Main Results:

    • Systolic abnormality involves outflow obstruction due to SAM and mitral regurgitation.
    • Diastolic dysfunction is common, characterized by impaired relaxation and increased stiffness.
    • Arrhythmias contribute significantly to morbidity and mortality.
    • Ventriculomyectomy effectively relieves obstruction and symptoms in patients with resting obstruction.
    • Calcium entry blockers may improve diastolic function in non-obstructive HCM.

    Conclusions:

    • HCM manifestations in systole, diastole, and rhythm are linked to hypertrophy extent and site.
    • Surgical and medical therapies have improved outcomes for most symptomatic HCM patients.
    • Significant progress has been made in managing HCM over the last 30 years.