Cardiac cycle a wave
Összes megtekintése When accelerated ventricular rhythm and sinus rhythm compete, ventricular fusion waves can be observed.
Sinus arrest is defined when cardiac cycle a wave duration of sinus impulse is more than 3 seconds. Sinus pause is defined when the duration is less than 3 seconds. Most of the former are pathological.
There are various forms of P wave, PR interval and frequency of P wave in patients with chaotic atrial tachycardia, which are easy to be misdiagnosed as atrial fibrillation. When the coupling interval of ventricular premature contraction is the same and the shape is different, it is called polymorphic ventricular premature contraction.
Circles of different colors indicate different cardiac cycle a wave of ventricular fusion waves, which are specific indicators for diagnosing ventricular tachycardia. If atrial premature contraction occurs too early and the bundle branch has not passed the refractory period, a bundle branch block pattern will appear, called aberrant conduction.
In sick sinus syndrome, sinus arrest can lead to the disappearance of sinus P wave, accompanied by a variety of escape and escape rhythm.
- Home Systole Systole, period of contraction of the ventricles of the heart that occurs between the first and second heart sounds of the cardiac cycle the sequence of events in a single heart beat.
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- Home Diastole Diastole — this period of time when your heart relaxes between beats — is also the time that your coronary artery is able to supply blood to your heart.
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The site of block is usually located in his bundle Purkinje system. In atrial fibrillation, a wide QRS complex is common, and it is necessary to distinguish between supraventricular sources and ventricular sources. When paroxysmal tachycardia occurs, the heart rate suddenly increases; when non paroxysmal tachycardia occurs, the heart rate gradually increases.
When the accelerated ventricular rhythm competes with the sinus rhythm, the shape of the ventricular fusion wave can change from beat to beat, which is called the accordion phenomenon.
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- Diastole - diastole is the part of the cardiac cycle during which the
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When atrial flutter is accompanied by different proportion of atrioventricular conduction, the ventricular rate becomes irregular, which needs to be differentiated from atrial fibrillation. When P wave gradually transits from upright to inverted, and PR interval shortens from more than ms to less than ms, the pacemaker moves between sinus node and atrioventricular node.
Atrioventricular nodal reentrant tachycardia with ventricular conduction can easily be misdiagnosed as atrial tachycardia with ventricular conduction. Correct analysis of atrial wave frequency.
The sinus wandering rhythm can occur in the sinoatrial node, between the sinoatrial node and the atrium, and between the sinoatrial node and the atrioventricular junction. In the third degree atrioventricular block, observing the QRS wave shape of escape beat can preliminarily judge the block level.
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