atrium of the heart


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atrium of the heart

one of the two upper chambers of the heart. The right atrium receives deoxygenated blood from the superior vena cava, the inferior vena cava, and the coronary sinus. The left atrium receives oxygenated blood from the pulmonary veins. Blood is emptied into the ventricles from the atria during diastole.

atrium of the heart

The upper chamber of each half of the heart. The right atrium receives deoxygenated blood from the entire body (except lungs) through the superior and inferior venae cavae and coronary sinus; the left atrium receives oxygenated blood from the lungs through the pulmonary veins. Blood passes from the atria to the ventricles through the atrioventricular valves. In the embryo, the atrium is a single chamber that lies between the sinus venosus and the ventricle.
See also: atrium
References in periodicals archive ?
In this system, an implantable sensor, which measures glucose levels using an enzyme-based electrochemical technology, was inserted in the bloodstream near the right atrium of the heart.
The AF ablation procedure, commonly called Pulmonary Vein Isolation, utilizes ProRhythm's proprietary balloon catheter which is inserted through a vein in the leg of the patient and advanced into the left atrium of the heart.
The procedure requires a trans-septal approach, making a small hole in the atrial septum to access the left atrium of the heart and a detailed electrophysiological study to detect pulmonary vein electrical potentials.
First, this study confirms that Connexin 40 plays a critical role in the electrical conduction in the atrium of the heart," said Dr.
While sitting at the console, I was literally immersed inside the patient's left atrium of the heart with an incredible view of the operative field.
Active steerability allows the catheter to be moved throughout the left atrium of the heart and facilitates placement of the catheter at each of the four pulmonary veins -- the target treatment sites during this procedure.
With a totally endoscopic approach, we used the da Vinci(TM) System to dissect the superior and inferior vena cava, place the snares, open the pericardium and the atrium of the heart exposing the septum," explained Dr.
Food and Drug Administration cleared the EnSite System for use in diagnostic mapping of complex arrhythmias in the right atrium of the heart during the second quarter of 1999, and cleared the EnSite NavX Surface Electrode Kit to display the position of conventional electrophysiology catheters in any chamber of the heart in the second quarter of 2003.
The AF ablation procedure, commonly called Pulmonary Vein Isolation, utilizes a proprietary balloon catheter that is inserted through a vein in the leg of the patient and advanced into the left atrium of the heart.