Mar 17, 2023
Ist Stage - First heart sound (S1) is heard at the end of the atrial systole (Mitral and Tricuspid valve closure).
2nd stage is isovolumetric contraction, the ventricles begins to contract, at this point no blood is coming in and going out.
3rd stage -Ejection click sound is heard at the opening of the aortic and pulmonic valve.As the pressure in the ventricles increase, there is opening of the aortic and pulmonic valve and slight bulge in the mitral and tricuspid valve. If due to any reason less amount of blood goes through ventricle , more amount of blood will accumulate in ventricles , that will cause pulmonary edema. In
4th stage- second heart sound (S2) is heard at the end of ventricular systole i.e closure of the aortic and pulmonic valve. After that the heart begins to relax and is called isovolumetric relaxation.
5th stage is rapid ventricular filling . 70% of the atrial blood goes into the ventricle. Opening of the mitral and triscuspid valve is refer to as opening snap. Opening snap is heard at the end of the volumetric relaxation
This is a high-yield topic for Medicine subject and it is highly important for NEET PG exam Preparation.
Q.During which phase of cardiac activity , the heart literally stand still (least cardiac motion)?
Q.Protodiastole starts from?
Heart sound heard at which side of stethoscope ?
All heart sounds are high pitched except
These are low pitched sounds
Atrial myxoma (benign tumor of the heart) is a pedunculated tumor , orginate from inter atrial septum, which being suspended in the left atria. While filling of blood, the movement the blood hit the tumor, it will swing . The tumor will strike the mitral valve leaflet and the sound produced due to tumor impacting is called as tumor plop sound. It is a diastolic finding because tumor impacts on already open mitral valve. This sound will be heard after the opening snap. It is a low pitched heart sound heard with the bell.
Effort intolerance, dyspnea on exertion, breathlessness while sitting (platypnea) because while sitting,due to gravity the tumor will block the mitral valve , which obstructs the passage of blood and more pressure will build up in left atria
Tumor plop sound, mid or late diastolic murmur, repeated impact of the tumor on mitral valve leaflet contribute to valve endothelium damage, and platelet plug formation which cause transient ischemic attacks
Cardiothoracic vascular surgery, surgically resection of the tumor
Tumor originating directly from mitral valve leaflet.
Embolic manifestations, Transient ischemic attacks, mimics mitral stenosis
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