Question

Mr. M.S.., an overweight, 55 yo white male presents to your clinic with chest pains. He has a history of hypertension, alcohol use and does not restrict his diet. He is currently taking nitroglycerin tablets as needed for angina. This pain is worse and is not controlled by nitroglycerin. The pain is radiating down his left arm. The pain in the chest feels like pressure or heartburn. You hear inspiratory rales, consistent with pulmonary edema. His blood pressure is 100/75. He begins to have difficulty breathing, especially when lying down. EKG and serum enzymes suggest a left ventricular wall myocardial infarction. Cardiac catheterization reveals a pulmonary wedge pressure of 30mm Hg (normal 5mm Hg) and two dimensional echocardiography measured an ejection fraction of 0/35 (normal, 0.55). In the Coronary ICU, he was treated with thrombolytic agents (tPA), digitalis (a positive inotropic agent) and furosemide (Lasix, a loop diuretic).

1.What measures above helped you determine that the stroke volume was reduced and why they correlate to reduced stroke volume?

Answer 1

STROKE VOLUME:

STROKE VOLUME is the volume of blood from the left ventricle per beat. pumped

EJECTION FRACTION(EF):

fluid EJECTON FRACTION is the volumetric fraction of ejected from a chamber with each contraction.

REDUCTION IN STROKE VOLUME:

to 35%. Since the ejection the stroke volume fraction is reduced is reduced ne

STROKE VOLUME FORMULA shows the correlation:

STROKE VOLUME is calculated by the formula C SV = EF XEDV (End diastolic volume) (STROKE VOLUME) nedo 100 a nos If there is there will be a reduce in EF (EJECTON FRACTION reduced stroke volume.