Where is his pacemaker located in? - ProProfs Discuss
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Where is his pacemaker located in?
A person's electrocardiogram (ECG) has no P wave but has a normal QRS complex and a normal T wave.

This question is part of block 3 cardio physio brs

Asked by Lucy, Last updated: Jan 16, 2021

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2 Answers

Anthony Paul Bonadio

Anthony Paul Bonadio

Its kind of my job to give answers

Anthony Paul Bonadio
Anthony Paul Bonadio, Teacher, MCA, PhD, Toledo

Answered Feb 26, 2019

There are absent p waves and this is a sign that there is a problem with the atrium. The pacemaker should be applied in the atrioventricular also known as AV node. As per the given, the qrs and the t waves are normal.

This means the depolarization and repolarization should be done in a normal manner which can only be done if option B is chosen. Placing the pacemaker in the Purkinje system would make the ventricles become activated in an abnormal sequence. This should be avoided because even the qrs would follow an abnormal sequence.

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John Smith

John Smith

John Smith
John Smith

Answered Sep 09, 2016

Atrioventricular (av) node-the absent p wave indicates that the atrium is not depolarizing and, therefore, the pacemaker cannot be in the sinoatrial (sa) node. because the qrs and t waves are normal, depolarization and repolarization of the ventricle must be proceeding in the normal sequence. this situation can occur if the pacemaker is located in the atrioventricular (av) node. if the pacemaker were located in the bundle of his or in the purkinje system, the ventricles would activate in an abnormal sequence (depending on the exact location of the pacemaker) and the qrs wave would have an abnormal configuration. ventricular muscle does not have pacemaker properties.
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