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When the heart's electrical system misfires, it's called atrial [term]. The heart starts generating electrical impulses in more than one place, not ust in the SA node.

When the heart's electrical system misfires, it's called atrial [term]. The heart starts generating electrical impulses in more than one place, not ust in the SA node.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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When the heart's electrical system misfires, it's called atrial [term]. The heart starts generating electrical impulses in more than one place, not just in the SA node.
Transcribed Image Text:When the heart's electrical system misfires, it's called atrial [term]. The heart starts generating electrical impulses in more than one place, not just in the SA node.
On an ECG (electrocardiogram), the electricity activity during a cycle of a pumping of the heart are all visible except atrial repolarization because: Atrial repolarization does not occur Atrial repolarization is masked by the depolarization signal of the ventricles O Atrial repolarization occurs over a long period of time and does not show up as a peak Atrial repolarization occurs much later than the PQRST signal recorded on the ЕCG
Transcribed Image Text:On an ECG (electrocardiogram), the electricity activity during a cycle of a pumping of the heart are all visible except atrial repolarization because: Atrial repolarization does not occur Atrial repolarization is masked by the depolarization signal of the ventricles O Atrial repolarization occurs over a long period of time and does not show up as a peak Atrial repolarization occurs much later than the PQRST signal recorded on the ЕCG
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