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The most common cause of myocardial rupture is a recent myocardial infarction, with the rupture typically occurring three to five days after infarction. [3] Other causes of rupture include cardiac trauma, endocarditis (infection of the heart), [4] [5] cardiac tumors, infiltrative diseases of the heart, [4] and aortic dissection.
A resuscitative thoracotomy is indicated when severe injuries within the thoracic cavity (such as hemorrhage) prevent the physiologic functions needed to sustain life.The injury may also affect a specific organ such as the heart, which can develop an air embolism or a cardiac tamponade (which prevents the heart from beating properly).
In a healthy heart all activities and rests during each individual cardiac cycle, or heartbeat, are initiated and orchestrated by signals of the heart's electrical conduction system, which is the "wiring" of the heart that carries electrical impulses throughout the body of cardiomyocytes, the specialized muscle cells of the heart.
These are known as transverse-tubules (t-tubules), which are also found in skeletal muscle cells and allow for the action potential to travel into the centre of the cell. [7] Special proteins called L-type calcium channels (also known as dihydropyridine receptors (DHPR)) are located on the t-tubule membrane and are activated by the action ...
An impulse (action potential) that originates from the SA node at a relative rate of 60–100 bpm is known as a normal sinus rhythm. If SA nodal impulses occur at a rate less than 60 bpm, the heart rhythm is known as sinus bradycardia. If SA nodal impulses occur at a rate exceeding 100 bpm, the consequent rapid heart rate is sinus tachycardia ...
“Cavitation occurs when there’s an external force on the joint fluid, causing small bubbles to form within the fluid and pop,” he says. The popping or cracking sound you hear is apparently ...
A myocardial infarction (MI), commonly known as a heart attack, occurs when blood flow decreases or stops in one of the coronary arteries of the heart, causing infarction (tissue death) to the heart muscle. [1] The most common symptom is retrosternal chest pain or discomfort that classically radiates to the left shoulder, arm, or jaw. [1]
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