الفهرس 
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Abstract
Evaluation of left ventricular function by noninvasive technique is desirable, because conventional invasive methods are rather time consuming, expensive, readily repr— oducible, and involve some risk for critically ill patients (Manolas and Rutiahauser, 1977).
Systolic time intervals based on simultaneous recording of carotid pulse, phonocardiogram and electrocardiogram were extensively studied to evaluate left ventricular performance using various parameters of left ventricular systole namely, total electro mechanical systole ( QS ), left ventricular ejection time C LVET ),Pre—ejection period C PEP ), and the ratio ( Weissler, 1961; Wallace et al, 1963; Weissler, 1970 ; Van De Werf et al, 1975 ; Stack et al, 1981; Hassanein, 1982 ).
Despite these extensive studies on left ventricular systole, yet a little interest has been given for studying left ventricular diastole.. Patients suffering from coronary heart disease, have a fixed obstruction in their coronary vessels. Hence, their myocardial perfusion distal to this significant obstruction is nearly all diastolic. As such, it is related not only to diastolic perfusion pressure
and microcirculatory tone, but also to diastolic time( Gregg and Fisher,1963; Berne,1964 ; )Jriscol et al, 1964; Gordan, 1974;
Rubio and. Berne, 1975).
The rationale of the present work is to attempt to clarify the changes in diastolic time in correlation with left ventricular ejection time in patients with coronary heart disease. This has been made through
1— Recording the diastolic time and left ventricular ejection time during the critical period of acute myocardial infarction particularly the first week of admission.
2— Assessment of the response of the diastolic time and left ventricular time to the two step tiaster exerice test in patients with stable angina pectoris.