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What is the time taken by atrial systole and ventricular systole?
0.4sec
Is the blood pressure in systemic arteries greatest during atrial systole or ventricular systole?
ventricular systole
Does atrial systole occur before or after the firing of the sinoatrial node?
The SA node makes the action potential for the heart. Atrial systole must occur after the action potential.
Would yo be able to feel a pulse during atrial systole only?
yes because during atria systole, the heart muscle tissue contracts.
What are ventricles doing atrial systole?
During atrial systole, the SA node ( power house for heart to keep on beating) is unable to send signals to ventricles. But heart has some back up power houses which take over, so the ventricles can still keep on beating but at a slower rate than normal during atrial asystole.
Who comes first atrial systole or ventricle systole?
Atrial systole -- The atrium contracts, then the ventricle.
What part of the ECG complex represents the atrial depolarization?
The P wave.
What is the time taken by atrial systole and ventricular systole?
0.4sec
Which is the phase of cardiac cycle in whitch the auricles contract?
The phase of the cardiac cycle in which the atria contract is called atrial systole. This occurs during the P wave on an ECG and helps to push blood from the atria into the ventricles.
The portion of the ECG that corresponds to atrial depolarization is the?
The portion of the ECG that corresponds to atrial depolarization is called the P wave. The P wave is the first wave on the ECG.
Is the blood pressure in systemic arteries greatest during atrial systole or ventricular systole?
ventricular systole
What part of the ECG records atrial contraction?
ECG records electrical activity and not mechanical, hence it has nothing to do with contraction. But P wave represents atrial depolarization.
Does atrial systole occur before or after the firing of the sinoatrial node?
The SA node makes the action potential for the heart. Atrial systole must occur after the action potential.
What part of the ECG tracing represents the time from the start of the atrial activity to the start of ventricular activity?
QT interval
What are the key differences in the ECG findings between premature atrial contractions (PAC) and atrial fibrillation (AFib)?
Premature atrial contractions (PAC) show an early, abnormal heartbeat before the regular rhythm resumes, often with a normal ECG pattern. Atrial fibrillation (AFib) displays a chaotic, irregular heartbeat with no distinct P waves on the ECG, indicating disorganized atrial activity.
Is systolic pressure where the ventricls are relaxing?
Relaxation = Diastole Contraction of the atria=Atrial systole Contraction of the ventricles = Ventricular systole
What is the time interval of atrial systole?
The time interval of atrial systole is typically around 0.1 seconds, representing the contraction of the atria to push blood into the ventricles. This phase occurs during the cardiac cycle as part of the heart's pumping action.
