User:Nicolecutrone/sandbox


 * I think Supraventricular Extrasystole should maybe put under PREMATURE ATRIAL CONTRACTION and not have its own page but dont know for sure

Supraventricular Extrasystole
A supraventrocular extrasystole is an extrasystole or premature electrical impulse in the heart, generated above the level of the ventricle. This occurs when the extra impulse is conducted not only to the ventricle but back to the SA node. This disrupts the depolarization, causing a shift in the sinus rhythm as cardiac activity can only occur after a normal sinus interval. The mechanism behind a supraventricualr extrasystole causes a compensatory pause to be observed. When observed in healthy patients, the irregular rhythm is harmless. However, frequent occurrences of the supraventricular extrasystole can be seen in cases with inflammation of the mydocardium, lack of oxygen, hypokalemia, digitalis intoxication, neurovegetative dysfunctions or overextend atrial walls.

Electrocardiogram
The premature impulse associated with supraventricular extrasystole has a an extra heart contraction and an extra premature QRS complex. Normal thin appearance, proceeded by P wave, incomplete compensatory pause.