The cardiac cycle is actually the action of the heart on the body from the end of a single heartbeat to the commencement of the next heartbeat. It consists of two phases: one when the heart relaxes and pumps away from the blood, known as Diastole; and one where the heart stays in a hyperactive state for a short time, called epsomole, after pumping out a small amount of blood. This entire process of the heart over an average of four to five minutes is called a beat.
Cardiac Cycle Phases:
The three main components of a cardiac cycle are namely pacing, or moving the heart from one phase to another, and conduction, or sending impulses along the aortic section to trigger the contractions and to relax the vessels. The cardiac cycle occurs when there are three different heart states, namely, resting, induced, and hyperactive. Other than these three states, the cardiac cycle takes place in a complex network of different phases, called the “AV node”.
There are basically three types of rhythms that take place inside the cardiac cycle. These are known as the ventricular, the atrial, and the mixed state. In case of a ventricular rhythm, the ventricular muscle relaxes and pumps away from the blood from the heartbeat to the legs. In the case of an atrial rhythm, the atrial muscle relaxes to pump the blood to the lungs, and the breath is taken in by the mouth. A mixed rhythm is a combination of both the ventricular and atrial rhythms and is characterized by the slowing of the heartbeat and the beating of the pulse.
Systole in a Cardiac cycle:
As mentioned above, the contractions and relaxing of the ventricular muscles is the main feature of a cardiac cycle. In the case of an atrial rhythm, the Systole is the dominant rhythm that takes place. The succeeding modes of rhythms are the Tonic and Locust. There are basically four distinct phases that take place during a cardiac cycle.
The first phase, or as it is commonly known as the Systole is a slow and steady increase in the heart’s rate. There are no signs of relaxation or breathtaking air in the Systole, and hence there are no arrhythmias caused in the heart’s rhythm. The second phase, or the Diastole, is a marked decrease in the heart’s rate accompanied by a reduction in the ventilation of air and a considerable relaxation of heart valves. The most common symptom is the breathy heart valve that is visible through a hole in the finger’s nail.
The next term used for Cardiac Cycle is “Toll-load” this term describes the period between the commencement of the Cardiac Cycle and its completion. In the Cardiac Cycle, the Systole is replaced by the Tonic. The next phrase, “load,” denotes that the period between the commencement of the Cardiac Cycle and its completion is the greatest in the Cardiac Cycle. In the Cardiac Cycle, the Diastole is replaced by the Lying Wave.
Phases of Cardiac Cycle:
As mentioned earlier, there are four phases of the Cardiac Cycle and hence four key points that have to be considered while teaching the students about this subject. The first four stages are Systole-Tonic-Diastole-Lying Wave relaxation. There are some key takeaways that need to be emphasized by the teachers while explaining the Cardiac Cycle. The first thing that has to be clarified is that the Cardiac Cycle has four phases, and the process is completed in four distinct stages. The early stage is termed the Systole stage. The second stage, or the Diastole, is characterized by the increase in the heart’s beat and the heart’s relaxation.
The third stage, or the Laying Wave, is marked by a temporary drop in the action potential of the heart, thereby reducing the workload on the heart muscles. The fourth stage, or the Cardiac Cycle phases, is marked by the slowest increase in the action potential and the maximum relaxations. To summarize, the Cardiac Cycle consists of four main Cardiac Cycle phases. So, when anyone is teaching the students about the Cardiac Cycle, they must explain each of these four phases.
