Detecting Heart Blockage in a Patient

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These chambers are separated by valves to prevent back flow of blood (into the atria). Between the right atrium and the right ventricle is the tricuspid valve and between the left atrium and the left ventricle is the bicuspid valve. Separating the left ventricle and the aorta is the aortic valve and the pulmonic valve is found between the right ventricle and the pulmonary artery.
The ability of the heart to contract stems from its possession of the SA node (Sino atrial node) also called the pacemaker as it generates the hearts own electrical signal and allows it to contract and pump blood to the rest of the body. This gives the heart a special feature making it the only organ that is capable of working outside the body if provided with enough oxygen.
The electrical system controls the rhythm of the heart and the heart rate. A problem with the hearts electrical system affecting the transfer of signals from the SA node to the AV node and then the ventricles leads to what is called a heart block. A disruption in the electrical rhythm from the SA node is regarded as an SA node block while disruptions below the AV node are classified under the AV block which is then further divided into sub-groups depending on the level disruption. In some cases, people are born with this condition and are said to have congenital heart block whereas those that get it through e.g. open heart surgery are said to have acquired heart block. Heart block can be classified as an arrhythmia which is a
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