室性早搏与房性早搏（Ventricular premature beat and atrial premature beat）.docVIP

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室性早搏与房性早搏（Ventricular premature beat and atrial premature beat）.doc

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室性早搏与房性早搏（Ventricular premature beat and atrial premature beat）

室性早搏与房性早搏（Ventricular premature beat and atrial premature beat） 1, the first heart sound of ventricular premature beats is stronger than atrial premature beat Because ventricular premature beats occur, the atria are still firing into the ventricles, and the atrioventricular valves are in full open state, so the heart sounds (first heart sounds) that suddenly turn off are naturally very noisy. Atrial premature beats do not have these 1 points. 2, ventricular premature beats can occur first heart split, and atrial premature beats will never appear Because ventricular premature beats occur when the pacemaker sequence does not occur in the normal order, the left and right ventricular contractions are not synchronized, and the left and right atrioventricular valves are closed simultaneously. (normal is excited from the septal top down conduction, almost at the same time points to the left and right ventricle, and left and right ventricular is almost simultaneous contraction, around atrioventricular valve is almost closed at the same time, the first heart sound produced is not split) 3. The interval after ventricular premature beats is longer than that of atrial premature beats This is because the premature beats of ventricular premature beats are complete, while the atrial premature beats are incomplete. 4, ventricular premature beat may be accompanied by positive jugular venous pulsation Because of premature ventricular contraction occurs, is also to atrial ventricular ejection, atrioventricular valve is completely open, so then the right ventricle suddenly shrink, will make the right ventricular blood into the right atrium, and reflux into the jugular vein, and 1 jugular venous pulsation. In this way, it is easy to distinguish atrial premature beats from premature ventricular contractions simply by auscultation. In fact, because the length of intermittent problems and premature beats when the strength after all is fuzzy concept, no specific criteria, the premature vent