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Myocardial contractility represents the innate ability of the heart muscle (cardiac muscle or myocardium) to contract.It is the maximum attainable value for the force of contraction of a given heart.
In electrocardiography, the ventricular cardiomyocyte membrane potential is about −90 mV at rest, [1] which is close to the potassium reversal potential. When an action potential is generated, the membrane potential rises above this level in five distinct phases. [1] Phase 4: Resting membrane potential remains stable at ≈−90 mV. [1]
Also, cardiomyocyte proliferation and regeneration has been demonstrated to occur in various neonatal mammals in response to injury in the first week of life. [ 5 ] [ 6 ] Current research aims to further understand the biological mechanism underlying cardiomyocyte proliferation in hopes to turn this capability back on in adults in order to ...
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Cat's blood is a little harder to come by and not as available as dog's blood," the cats vet, Dr. Sean Perry, told the Miami Herald. That's where a dog comes into the picture and in this case, a ...
of or relating to a blood clot, clotting of blood Greek θρόμβος (thrómbos), lump, piece, clot of blood thrombus, thrombocytopenia: thyr(o)-thyroid: Greek θῠρεός (thureós), large oblong shield; + εἶδος (eîdos), a form or shape thym-emotions Greek θῡμός (thūmós), spirit, soul; courage; breath, mind, emotions ...
Contracting heart muscle uses a lot of energy, and therefore requires a constant flow of blood to provide oxygen and nutrients. Blood is brought to the myocardium by the coronary arteries. These originate from the aortic root and lie on the outer or epicardial surface of the heart. Blood is then drained away by the coronary veins into the right ...
Ventricular hypertrophy can result from a variety of conditions, both adaptive and maladaptive. For example, it occurs in what is regarded as a physiologic, adaptive process in pregnancy in response to increased blood volume; but can also occur as a consequence of ventricular remodeling following a heart attack.