out the he on the ventri 3 What occurs in art and into the l

out the he on the ventri 3) What occurs in art and into the lar arteries etti The the heart during the T Wave? of wave Sent S the rep ol ari dati the ventric lcs 5) Briefly explain Tachycardia and Brady Compare and contrast the Ta chy Cardia Brady cardia resting leo b HR 100 bpm 6) the resting heart rate speeds up, what happens to stroke volume? answer. ut of the heart pcr minute. 7) Put the following in the order of events during one cardiac cycle. Atrial Myocardium AV Bundle Branches AV Bundle AV Node Purkinjie Fibers SA Node Ventricular Myocardium 8) What occurs during each of the following? B)

Solution

3) A typical ECG consists of a P wave (atrial depolarization), a QRS complex (ventricular depolarization), and a T wave (ventricular repolarization).

T wave represents ventricular repolarization. During this wave both the ventricles of the heart are relaxing simultanously. Both the auricles of heart are also in relaxation phase at this time, so all the four chambers of heart are relaxing.

5) Bradycardia: Bradycardia is a very slow heart rate of less than 60 beats per minute. It is usually caused when the natural pacemaker of heart isn\'t working right or when the electrical pathways of the heart are disrupted.

Tachycardia: Tachycardia is a very fast heart rate of more than 100 beats per minute.Tachycardia occurs when an abnormality in the heart produces rapid electrical signals that quicken the heart rate.