Fibrillation
rapid and uncoordinated contractions of the atria or ventricles. This condition is known as fibrillation. When the atrial impulse fails to reach the ventricle, a condition known as heart block results.
When relaxed, the atria expand, and then the ventricles contract.
Ventricular fibrillation is the term for rapid irregular contractions of the ventricles. Because the contractions are unsynchronized and random, the ventricles do not pump effectively. The patient may have no palpable pulse, and the condition can be fatal.
Yes, atria contracts before the ventricles.
The atria Actually, it is the contractions (squeezing) of the ventricles (the lower parts of the heart), not the atria (the upper parts), that do the pumping. That's why the lower part of the heart is larger, and the muscular walls are thicker. The atria receive the blood from the body and pump it down into the ventricles.
the difference between the ventricles and the atria is that the ventricles are thicker
The atria Actually, it is the contractions (squeezing) of the ventricles (the lower parts of the heart), not the atria (the upper parts), that do the pumping. That's why the lower part of the heart is larger, and the muscular walls are thicker. The atria receive the blood from the body and pump it down into the ventricles.
The atria Actually, it is the contractions (squeezing) of the ventricles (the lower parts of the heart), not the atria (the upper parts), that do the pumping. That's why the lower part of the heart is larger, and the muscular walls are thicker. The atria receive the blood from the body and pump it down into the ventricles.
The tissue that forms an electrical block between the atria and ventricles is the atrioventricular (AV) node and the surrounding fibrous tissue known as the cardiac skeleton. The AV node receives electrical signals from the atria and delays them before transmitting to the ventricles, allowing for coordinated heart contractions. The cardiac skeleton provides structural support and insulation, preventing direct electrical conduction between the atria and ventricles, ensuring that the heart beats in a controlled manner.
In the context of the heart, the ventricles are not considered superior; they are actually located inferior to the atria. The atria are positioned above the ventricles, receiving blood from the body and lungs before it is pumped into the ventricles. Therefore, in anatomical terms, the atria are superior to the ventricles.
The Atria and Ventricles are parts of the heart not the blood. The Atria is the upper chambers of the heart and the Ventricles are the lower chambers of the heart.
ventricles