Contrary to systolic dysfunction, diastolic malfunction is characterized by normal contractility and a typical ejection fraction. The relaxation of ventricles in this disorder is impaired, resulting in an increase in ventricular pressure into the left atrium and pulmonary venous system leading to signs of pulmonary and systemic venous congestion. This decrease in preload results in a decrease in blood volume, especially during periods of increased activity or exercise, when blood is unable to move freely into the left ventricle. Consequently, this immobility causes a decrease in lung compliance, and an increase in the work of breathing, resulting in dyspnea.
Pulmonary compliance is the degree of the lungs ability to stretch and expand elastic
Pulmonary compliance is the degree of the lungs ability to stretch and expand elastic