Duration of phases of left ventricular systole using indirect methods. II. Acute myocardial infarction.

Duration of phases of left ventricular systole using indirect methods. II. Acute myocardial infarction.

Duration of phases of left ventricular systole using indirect methods. I. Normal subjects.

The duration of the various phases of left ventricular systole has been measured in a series of So normal subjects using high speed simultaneous recordings of the electrocardiogram, the phonocardiogram, the carotid pulse, and the apex cardiogram. The five phases of systole measured were: total electromechanical systole (Q-A2 interval); left ventricular ejection time (LVET); pre-ejection period ...

Duration of the phases of left ventricular systole.

• The influence of heniodynamic variables on the duration of certain phases of ventricular systole has been studied by several investigators in intact animals and in isolated heart preparations.' Even in isolated hearts, it is not possible to change one heniodynainic variable without inducing changes in one or more intrinsic determinants of the heart's performance. For example, augmenting strok...

Myocardial damage of the entire ventricular region in a patient with acute myocardial infarction

Technetium-99m-pyrophosphate (99mTc-PYP) has been used, in combination with thallium-201, to estimate the site and extent of myocardial infarcts. We report a case of acute myocardial infarction with severe coronary disease in which the distribution of 99mTc-PYP was extensive. A 78-year-old man presented with dyspnea, and a diagnosis of non-ST-segment elevation acute myocar...

Left Ventricular Size after Acute Myocardial Infarction

The distance from the midline to the left heart border measured in a standardized manner on calibrated chest roentgenograms was determined serially in 125 patients after acute myocardial infarction. This external left heart dimension (LHD) was compared to the normal value, and its prognostic value was assessed during early and late follow-up periods (average 10, range 2-31 months). Within 96 ho...