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Left atrial mechanical function in patients with essential hypertension.

Mustafa Kemal Erol1, Mustafa Yilmaz, Mahmut Acikel

  • 1Ataturk University Medical School Hospital, Department of Cardiology, Erzurum, Turkey. mkerol@superonline.com.tr

Acta Cardiologica
|October 31, 2002
PubMed
Summary

Essential hypertension increases left atrial volumes and alters mechanical function. Hypertensive patients show decreased passive emptying but increased active systolic function, indicating a compensatory mechanism.

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Area of Science:

  • Cardiology
  • Echocardiography
  • Hypertension Research

Background:

  • Essential hypertension is a prevalent cardiovascular risk factor.
  • Left atrial (LA) function plays a crucial role in cardiovascular health.
  • Understanding LA mechanical function in hypertension is vital for risk stratification.

Purpose of the Study:

  • To evaluate left atrial (LA) mechanical function in patients with essential hypertension.
  • To assess changes in LA volumes and emptying function using two-dimensional echocardiography.

Main Methods:

  • Echocardiographic LA volume measurements (Vmax, Vp, Vmin) were performed in 36 untreated hypertensive patients and 20 controls.
  • LA volumes were indexed to body surface area.
  • Various LA emptying functions, including passive and active emptying fractions, were calculated.

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Main Results:

  • Hypertensive patients exhibited significantly increased LA volumes (Vmax, Vmin, Vp) compared to controls.
  • A significant decrease in LA passive emptying volume and fraction was observed in hypertensives.
  • Hypertensives showed significantly increased LA active emptying volume and fraction, suggesting enhanced systolic pump function.

Conclusions:

  • Chronic hypertension is associated with increased LA volumes and impaired passive emptying function.
  • Enhanced LA systolic pump function in hypertensive patients may represent a compensatory mechanism.
  • These findings highlight the impact of hypertension on left atrial mechanics and potential links to left ventricular hypertrophy.