Describe6 marksChallenge
A patient’s left atrioventricular (mitral) valve fails to close completely during ventricular systole, allowing a small volume of blood to flow back into the left atrium. Describe the pressure changes that occur in the left atrium and left ventricle during a normal cardiac cycle, explaining how the opening and closing of the atrioventricular and semilunar valves are linked to these pressure changes. Explain the role of the sinoatrial node, atrioventricular node and Purkyne tissue in coordinating the timing of valve closures. Describe how the leaky mitral valve alters the pressure changes in the left atrium.