Doctor insights on:
Opening And Closing Of Heart Valves
Can you explain how the heart valves opening/closing is synchronized with the heart's pacemaker firing?
Passive valves: The heart valves are passive mechanisms. They open as blood flows through them. When blood starts to backflow, they slam shut, causing the sounds you hear when you listen to your heart. So long as the valves are functioning properly, the synchronization is all done by the four chambers, with the valves just opening and closing automatically. ...Read moreSee 1 more doctor answer
A valve is a structure that regulates the direction of flow. The heart is a special kind of pump. It moves blood by squeezing and relaxing. There are 4 chambers and each chamber has a valve. This keeps blood from moving backwards when the heart squeezes. When a chamber squeezes it lets the blood move forward but when the chamber is relaxed it prevents the blood from ...Read more
4 locations: The first valve blood crosses is the tricuspid valve between the right atrium and right ventricle. Blood then flows across the pulmonic valve between the right ventricle and the lungs on its way to the lungs where it picks up oxygen and discards waste. It returns to the left atrium and crosses the mitral valve between the left atrium and left ventricle. It then exits across the aortic valve. ...Read moreSee 1 more doctor answer
Tissue valves: We use beef, pig and human aortic valves as replacements in humans. Those three most closely simulate the size of the human valves. ...Read more
Mitral valve: Outcomes with mitral valve replacement are not quite as good as aortic valve replacement but, in many cases, the mitral valve can be repaired which is always preferable to replacement and has excellent outcomes if it's an option. The tricuspid and pulmonic valves are lower risk and less frequently needed operations. ...Read more
Prevent leak-back: The valves keep the blood moving forward in the circulatory system. The blood moves in starts and stops, with each heart beat. So to keep it moving forward and to prevent it from leaking back when the heart relaxes, there are one-way valves in place, much like the locks and dams in the panama canal. ...Read more
Does not enlarge: Your heart valves don't enlarge. They can get thickened or calcified. They can get infected or destroyed by infection. The structures that support the heart valves can get stretched or rupture, but the valves themselves don't get enlarged. Heart chamber can get enlarged. ...Read more
Does recovery for two heart valves replaceing longer than just one replaceing plz.i av to have two replaced?
It varies: Everyone is different. A lot depends on age, severity of illness and degree of vigor vs. frailty. On average younger people can expect to be back at full strength in 2-3 months. The stronger you are going in to surgery, the quicker the recovery. It varies from person to person, but double valve surgery will likely take longer than single valve. Focus on your goal of full recovery. ...Read more
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