Systolic Time Intervals and Left Ventricular Function in Acute Myocardial Infarction
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چکیده
منابع مشابه
Systolic time intervals and left ventricular function in acute myocardial infarction.
Systolic time intervals (STI) were measured simultaneously with left ventricular pressure, right atrial pressure, and cardiac output in patients with acute myocardial infarction (AMI) within 24 hours of the onset of symptoms. Electromechanical systole (QS2) and left ventricular ejection time (LVET) were measured and preejection period (PEP) calculated and corrected for heart rate. LVET showed s...
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Left ventricular systolic time intervals were measured daily during 601 episodes of acute myocardial infarction. The ratio of pre-ejection period to ejection period during the first 24 hours permitted patients to be arranged in six prognostic groups with mortalities while in hospital ranging from 4 to 60 per cent. The only factors completely independent of the systolic time intervals which were...
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Acute effects of altered preload on systolic time intervals were examined in I7 patients; 7 subjects without acute myocardial infarction and normal haemodynamics (post aortic valve surgery-Class I), 6 patients with acute myocardial infarction and raised left ventricular filling pressure, and 4 patients with acute myocardial infarction and normal filling pressure. Alterations in preload were bro...
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The effects of graded increments of passive head-up tilt on the duration of the systolic time intervals corrected for heart rate were investigated in 15 normal subjects. Head-up tilt caused a prolongation of the pre-ejection period and a shortening of the left ventricular ejection time, while total electromechanical systole diminished minimally. The lengthening of the pre-ejection period and ab...
متن کاملApex cardiogram and systolic time intervals in acute myocardial infarction.
cent a systolic 'bulge'. The a-E interval and the time to the systolic peak of the apex cardiogram were significantly shortened. The systolic time intervals showed shortening of the pre-ejection period i, isovolumetric contraction time, electromechanical systole, and ejection time along with the E-J interval which represents the phase of maximum ventricular ejection. The changes observed were t...
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ژورنال
عنوان ژورنال: Circulation
سال: 1972
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.45.2.375