Assessment of arterial Blood Pressure on heart ejection

Abstract

Recently measuring of ejection fraction by scintigraphy has been used as indicator of heart muscle ability to contract. This study aimed to identify and evaluate the effect of the arterial blood pressure on ejection fraction. Accordingly the data was collected from 50 patients at Elnilein medical center, department of nuclear medicine, during the period from 4/4/2011 to 24/8/2011. The patients were injected with a sestamibi (hexakis [2-methoxyisobutylisonitril]) and 99m Tc- 99m Tc-tetrofosmin (1, 2-bis [bis (2-ethoxyethyl)-phosphino] ethane) then gamma camera was used to detect the count rate and hence ejection fraction was calculated. The data were analyzed by using statistical packages for social studies (SPSS) under windows using linear association between arterial blood pressure and age, body mass index, stroke volume, cardiac output and ejection fraction. Consequently the results revealed that the ejection fraction decreased as the arterial blood pressure increased with inverse liner relationship by a coefficient factor equal to 0.53% per mmHg for systolic blood pressure, and 0.718 % per mmHg for diastolic blood pressure. Also the stroke volume and cardiac output showed a direct linear relationship with the ejection fraction. The ejection fraction increased by 0.503 % per ml of stroke volume and by 5.366 % per L / minutes for cardiac output. As well ejection fraction affected by age and body mass index, adversely i.e. in an inverse linear relationship by 0.480 % per years for age and 0.584 % for one unit of body mass index.