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Heart and hypertension

R Fogari1, A Zoppi

  • 1Department of Internal Medicine and Therapeutics, University of Pavia, Italy.

American Journal of Hypertension
|February 1, 1989
PubMed

Insights

Hypertension causes cardiac issues like left ventricular hypertrophy (LVH) and coronary atherosclerosis. Antihypertensive drugs help with heart failure from LVH but not coronary events, highlighting complex cardiovascular disease mechanisms.

Area of Science:

  • Cardiology
  • Hypertension Research
  • Molecular Cardiology

Background:

  • Hypertension leads to cardiac involvement, including hypertensive heart disease (left ventricular hypertrophy) and coronary atherosclerosis complications.
  • Antihypertensive treatment effectively reduces heart failure incidence but shows limited efficacy in preventing coronary events.
  • While elevated blood pressure is a primary stimulus for cardiac hypertrophy, neurohumoral factors also significantly modulate left ventricular hypertrophy development.

Purpose of the Study:

  • To explore the mechanisms of cardiac involvement in hypertension.
  • To differentiate the direct effects of blood pressure from other risk factors in cardiac complications.
  • To investigate the molecular basis of changes in myocardial contractility during hypertensive cardiac hypertrophy.

Main Methods:

  • Review of established knowledge on hypertensive heart disease and coronary atherosclerosis.
  • Analysis of factors influencing left ventricular hypertrophy development beyond blood pressure.
  • Examination of morphological and molecular changes in hypertrophied cardiac muscle, including myosin isoenzymes and ATPase activity.

Main Results:

  • Left ventricular hypertrophy is a key cardiac manifestation of hypertension, distinct from coronary complications.
  • Antihypertensive therapy impacts heart failure but not coronary events, suggesting different underlying pathways.
  • While experimental models show myosin isoenzymatic shifts, these are not consistently observed in humans; decreased myofibril ATPase activity is noted in human hypertrophied ventricles.

Conclusions:

  • Hypertension-induced cardiac hypertrophy and coronary atherosclerosis have distinct pathophysiological pathways and responses to treatment.
  • The molecular basis for altered cardiac contractility in human hypertensive hearts remains unclear.
  • Further research is needed to elucidate the role of neurohumoral factors and the precise molecular mechanisms driving cardiac changes in hypertension.

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