Long term effects of hormone replacement therapy on heart rate variability, QT interval, QT dispersion and frequencies of arrhythmia.

Background: The aim of the study was to investigate the effects of a long term (1 year) hormone replacement therapy (HRT) on QT interval, QT dispersion (QTd) frequencies of arrhythmia and heart rate variability (HRV) parameters.

Methods: Forty-six healthy postmenopausal women (mean age; 55.34+/-4.

Left ventricular diastolic function assessment by tissue Doppler echocardiography in relation to hormonal replacement therapy in postmenopausal women with diastolic dysfunction.

The objective of this study was to evaluate the effect of hormone replacement therapy (HRT) regimens on left ventricular diastolic function by using mitral pulsed wave Doppler (MPWD) and tissue Doppler velocities (TDE). Seventy-eight postmenopausal women with normotensive and impaired diastolic left ventricular filling were included in the study. All the patients began a six-cycle HRT course.

Relationship between changes in R-wave amplitude during left ventriculography and the seriousness of coronary heart disease.

Serious complications, such as myocardial infarction or death, may occur particularly in patients with severe coronary heart disease during coronary angiographies. Therefore, prediction of severe coronary heart disease before or during the initial steps of the procedure can provide a decrease in frequency of such complications. To predict the seriousness of coronary heart disease during left ventriculography, before, during, and after the application of contrast matter, electrocardiography (ECG) records were taken and R-wave amplitudes were measured.