What Are The 4 Factors That Influence Stroke Volume? However, stroke volume depends on several factors such as heart size, contractility, duration of contraction, preload (end-diastolic volume), and afterload. Corresponding to the oxygen uptake, women’s need for blood flow does not decrease and a higher cardiac frequency makes up for their smaller stroke volume. What
Is S1 Louder Than S2? Normally, S1 is louder than S2 at the apex, and softer than S2 at the base of the heart. Pathologic changes in the intensity of S1 relative to S2 may be seen in certain disease states. When evaluating the intensity of S2, note the relative intensity of the aortic component
Is The Contraction Of The Heart? Systole is the contraction phase of the cardiac cycle, and diastole is the relaxation phase. At a normal heart rate, one cardiac cycle lasts for 0.8 second. What does contraction of the heart mean? Cardiac contraction is the end result of action potentials that are initiated at the sinoatrial
What Causes Decreased Cardiac Output? Conditions like myocardial infarction, hypertension, valvular heart disease, congenital heart disease, cardiomyopathy, heart failure, pulmonary disease, arrhythmias, drug effects, fluid overload, decreased fluid volume, and electrolyte imbalance is common causes of decreased cardiac output. What are signs of decreased cardiac output? Low-output symptoms, which are caused by the inability of
What Does The Chordae Tendineae Attached To? Chordae tendineae: Thread-like bands of fibrous tissue which attach on one end to the edges of the tricuspid and mitral valves of the heart and on the other end to the papillary muscles What holds the chordae tendineae in place? The papillary muscles are muscles located in the
What Is The Correct Order Of Depolarization In The Heart? The atrial depolarization spreads to the atrioventricular (AV) node, passes through the bundle of His What is the order of the conduction system of the heart? The cardiac conduction system comprises the following structures, in order, the SA node, the AV node, the bundle of
How Does Contractility Affect End Diastolic Volume? Increased heart rate alone decreases stroke volume because of reduced time for diastolic filling, which decreases end-diastolic volume. How does contractility affect EDV? Briefly, an increase in venous return to the heart increases the filled volume (EDV) of the ventricle, which stretches the muscle fibers thereby increasing their