<prompt> Following an attack of myocardial infarction the mortality and morbidity of the patient is indicated byVentricular extra systoleleft ventricular ejection fraetionDuration of syneopePercentage of narrowness of coronary artery  <response>: Ans. is b left ventricular ejection fraction Several techniques can be used to assess the impaired cardial functions in patients. Such asend diastolic pressurecardial output andstroke volume.The disadvantage with these methods is that they can be found normal with impaired cardiac functionso a more sensitive test i.e. Ejection fraction is used for the assessment of impaired cardiac function.Ejection fraction stroke volumeenddiastolic volume.It is more sensitive in the sense that when other parameters such as stroke volume and enddiastolic pressure are normal during any cardiac impairment, abnormality can be detected in the ejection fraction 