Essays Tagged: "Sinoatrial node"

Abnormalities in the cardiac cycle.

the atria and the bottom chambers, the ventricles. A normal heart beat begins when the Sino-Atrial Node, located on the posterior wall of the right atrium. The Sino-Atrial Node initiates the "wave of ... ates the "wave of contraction" which results in the contraction of the atria. The Atrio-Ventricular Node delays the signal initiates by the Sino-Atrial node for about 0.15 seconds, permitting full atr ...

(7 pages) 73 0 5.0 Jun/2003

Subjects: Science Essays > Biology > Human Biology

The effects of exercise on cardiac output

n the anticipation phase is when the body is getting ready for exercise, so not only does SA and AV nodes speed up the contractions, to distribute blood round to the muscles faster. Blood is diverted ... of lactic acid, and get rid of Carbon dioxide. Therefore just as in the anticipation the SA and AV nodes will be sending bigger and faster electrical impulses to contract the atria and ventricles.In ...

(3 pages) 88 1 5.0 Mar/2004

Subjects: Science Essays > Biology > Human Biology

Compare and contrast the conductive versus the conductive versus the contractile cardiac muscle fibers.

due to decrease in K+ permeability· No Na+ gatesConductive muscle fibers are located in the nodes:· SA node (Right atrium)· AV node (Between atrium & ventricular walls)&middo ... ial) initiates the AP, which spread throughout the heart to trigger its rhythmic contractions.1. SA node - generates typically impulses about 75 times a minute. Because no other region of the conducti ...

(2 pages) 29 0 4.3 Feb/2005

Subjects: Science Essays > Biology > Human Biology

The Cardiovascular System

e initiates depolarization & cardiac contraction. Electrical impulse is initiated by SA (sinoatrial) note; the pacemaker of the heart. Mechanical contraction of the atria follows the ...

(6 pages) 85 1 3.0 Apr/2005

Subjects: Humanities Essays > Health & Medicine


t to contract and relax. Each heartbeat is initially stimulated by a network of cells called the SA node, located in the upper right chamber of the heart. This functions as the natural pacemaker of th ... eart. This functions as the natural pacemaker of the heart. The impulse then travels through the AV node, which separates the top and bottom chambers of the heart and acts as a gate-keeper. From here ...

(7 pages) 22 0 0.0 Jul/2001

Subjects: Businesss Research Papers


hythm distinguishable in measurement. Each heartbeat of the normal human heart originates in the SA node. A normal heart rate is approximately 70 beats per minutes (bpm). During times of rest, the rat ...

(5 pages) 23 0 0.0 Nov/2001

Subjects: Literature Research Papers

Nursing Management of the Cardiac Arrhythmias

avel of the electrical impulses normally goes after of the track displaced bellow. The cells of the sinoatrial (SA) node (found in the right atrium) generates of rate of 60-100 per minute. In certain ...

(4 pages) 37 0 2.5 Nov/2007

Subjects: Humanities Essays > Health & Medicine