Abnormalities in the cardiac cycle.

The fondness is evolutionary masterpiece. Yet like everything else in nature, it is non perfective aspect and problems may arise. However before its flaws puke be mentioned and analysed. It would be prudent to understand how the heart functions in the frontmost emplacement before going in depth into the different problems that exponent arise within the cardiac cycle. Of which a oversize deem be covered under the various Arrhythmias, which can be split up into two major groups, ventricular arrythythmias and supraventricular arrythythmias. I.e., arrythythmias that fresh in the ventricles and arrythythmias that occur above them. Subdivision is possible, with arrhythmias further shared out into Disorders of impulse conduction and disorders of impulse generation. The various and detailed events that come place with every heart beat is referred to as the cardiac cycle. The top chambers of the heart are called the atria and the fag cease chambers, the ventricles. A normal heart beat begins when the Sino-Atrial Node, hardened on the posterior wall of the right atrium. The Sino-Atrial Node initiates the motion of densification which results in the contraction of the atria. The Atrio-Ventricular Node delays the signal initiates by the Sino-Atrial pommel for about 0.15 seconds, permitting full atrial systole before ventricular systole. This ensures that the ventricles are filled before the ventricles contract. When the wave of contraction reaches the bill of the ventricles, ventricular contraction begins. As the pressure in the ventricles increases, the AV valves close. This prevents the back flow of kindred. With continued contraction of the ventricles, blood leaves the heart via the aortic and pulmonary valves into the aorta and pulmonary artery respectively. At the end of the cardiac cycle, all the chambers relax, the aortic and pulmonary valves close, preventing the blood from satiny back into the heart. Atria begin to fill up with... ! If you ask to tug a full essay, order it on our website: OrderCustomPaper.com

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