Phase Voltage

The tension phase in cardiology is a period of the cardiac cycle that begins with contraction of the ventricles and ends with maximum tension of the ventricular walls. This period is characterized by a rapid increase in blood volume in the ventricles and contraction of the atria.

The tension phase is one of the most important periods of the cardiac cycle. It ensures that the ventricles are filled with blood and prepared for the next contraction. During this period, the maximum load on the heart occurs, and therefore it is important to control its work and prevent overload.

To monitor the work of the heart during the stress phase, various diagnostic methods are used, such as ECG, echocardiography, etc. They allow you to assess the condition of the heart, identify possible disorders and take measures to eliminate them.

In addition, the tension phase can be associated with various heart diseases, such as coronary heart disease, arrhythmias and others. Therefore, it is important to monitor your health and consult a doctor if any heart-related symptoms appear.

The tension phase or tension period, so often called by cardiologists, is one of the important indicators of the electrical activity of the heart and reflects cardiac activity during systole and isovolumetric contraction of the ventricles of the heart. This period occurs immediately after diastolic relaxation. The duration of the tension phase is usually 0.03 seconds (30 milliseconds). The tension phase can also be interpreted as the time between the onset of atrial contraction and the onset of ventricular contraction, which is approximately 246 milliseconds. The onset of the tension phase is marked by the partial closure of the aortic and pulmonary valves and the opening of the atrioventricular filament valve, accompanied by simultaneous contraction of the atrium and the conduction system of the heart. Both processes go strictly at a certain moment and are “synchronized”. It is also noted that the blood pressure in the arterial bed begins to decrease during this phase, which makes the period of the tension phase also a sensitive indicator of transient shock. Following this, the heartbeat continues with the ejection phase or prolonged isovolemic phase. Based on the duration of the tension phase, there are early, middle and late or contractile phases.