Heart Murmurs in Dogs

The normal heartbeat makes a sound that corresponds to the closing of heart valves during the heart cycle.  A heart murmur, caused by turbulent blood flow within the heart or large vessels that arise from it, sounds like an abnormal whooshing or swishing sound during the heart beat cycle. This can be heard with a stethoscope and, if loud enough, can be felt as a buzzing or vibration over the heart. Careful listening with a…

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Heart Murmurs in Cats

The normal heartbeat makes a sound that corresponds to the closing of heart valves during the heart cycle. A heart murmur, caused by turbulent blood flow within the heart or large vessels that arise from it, sounds like an abnormal whooshing or swishing sound during the heart beat cycle. This can be heard with a stethoscope and, if loud enough, can be felt as a buzzing or vibration over the heart. Careful listening with a…

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Arrhythmias (Abnormal Heart Rhythms) in Dogs and Cats

  The normal pacemaker of the heart lies in the heart’s right upper chamber. This structure, known as the sinus node, normally generates the heart’s electrical impulse. This impulse is then carried through the upper chambers and reaches a structure known as the AV node. Normally, the AV node is the only electrical connection between the upper and lower chambers of the heart, so it conducts the impulse down to the pumping chambers, which then…

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