Atrioventricular node

Atrioventricular valves, or AV valves, are located between the atria and ventricles. Between the right atrium and right ventricle, the tricuspid valves exist; and the mitral valve separates the left atrium and left ventricle. Chordae Tendineae, which are attached…

muscles which contract involuntarily to pump blood. Each side of the heart contains valves which prevent the regurgitation of blood. The left and right side of the heart have a mutual muscular segment by which they are separated and is known as the atrioventricular septum. Differences between Left and Right Side of the Heart? • Left side of the heart operates at a level up to 125 mmHg, whereas the right side of the heart operates at 25 mmHg. • Right side drives a short, low pressure pulmonary…

relaxes rhythmically. This behaviour is shown by the observation of the general fluctuations in the force values as well as the consistent patterns of the ECG which occurs in regular intervals. 2. This delay is primarily caused by the atrioventricular node (A-V node) and the adjacent conductive fibres. Conduction in cardiac muscle is hindered by the decreasing number of gap junctions along the pathway of conduction which creates a resistance against the conduction of excitatory ions, i.e.…

are now in the right side of the heart, literally, the right atrium. The SA node’s action potential fires again and through the tricuspid valve we go. We’re now in the right ventricle. This one is roomy like the left so we have to wait with the AV node until the ventricle fills up some more. Finally! The AV bundle fires and we pump through the pulmonary semilunar valve into the pulmonary trunk and out the pulmonary arteries. We are on our way back to the lungs now. It gets a little small again…

After electrical cardioversion, the doctor may prescribe anti-arrhythmic medications to help prevent future episodes of atrial fibrillation. Medications may include: dofetilde (Tikosyn), flecainide, propafenone (Rythmol), amiodarone (Cordarone, Pacerone), and sotalol (Betapace, Sorine). Although these drugs may help maintain a normal heart rhythm, they can cause side effects, including: nausea, dizziness, and fatigue. Rarely, they may cause ventricular arrhythmias – life-threatening rhythm…

intrinsic system consist of: sinoatrial node or SA node (found on the posterior wall of the right atrium functions to initiating depolarization impulse that produces an action potential spreading through the atria to the AV node as a cardiac pacemaker setting a pace of the hearts beat); intermodal pathway (found in the walls of the atria connecting the SA node to the AV node it functions in distributing an action potential to the atria’s contractile cells), AV node (found within the inferior…

In case of pacing the coronary heart rhythm from ventricular conduction device, the price slows right down to 30-40/min and QRS complexes on the ECG are wider than 120 ms. In ventricular traumatic inflammation the depolarization of cardiomyocytes is caused by several mechanisms – reentry, induced hobby, ectopic foci of excitation or mixture of these. In ventricular traumatic inflammation (VF) the heart paintings is useless, fibrillating ventricals are not pumping blood and the circulation stops.…

The Mechanics of the Heart An electrocardiogram, or EKG/ ECG, is a non-invasive test that measures the electrical activity of the heart and its electrical patterns. An electrical signal is sent through the heart to produce contractions that move the blood. This is what an EKG measures. In total that test may take from five to ten minutes and are ordered by a doctor to examine the heart more close. An EKG is done while the patient is lying down completely still (in order to reduce artifact or…

the superior and inferior vena cava. A chamber of the heart beats because of the electrical impulses located around areas of the heart that travel across the heart which allows the muscles to contract.The SA node located in the right atrium is also known as the pacemaker of the heart, this node conducts an electrical impulse that makes the right atrium contract causing the tricuspid valve to open and for blood to pass through into the right ventricle. Then when the right ventricle is ready to…

The AV node is grips of cells located in between the atria and ventricles. They are usually due to one of two things; re-entry or increased ability to automatically beat. Different types of supraventricular arrhythmias include atrial flutter, paroxysmal, supra…