Normally this would not occur. Beats between regularly spaced beats are called premature contractions and can occur with either the top or bottom chambers of the heart. This has the potential for causing an irregular heartbeat called an arrhythmia.
rests.
Between beats, the heart muscle rests.
heart This muscle is called cardiac muscle. Each cell can beat on its' own if in a sterile dish. If it touched another, they will beat together.
rests
Your heart is still a muscle, and thus forth needs to rest in between beats. Rest.
The heart rests between each beat. As long as the myocardium (heart muscle) receives sufficient oxygenated blood and maintains a proper rhythm, it can (and must) perform this beat/rest cycle throughout and organism's entire life.
I think they rest but I'm not entirely sure.
Cardiac muscle has what is known as intercalated disks. These connect heart muscle cells to each other, which allows an impulse (contraction) to move through the heart synchronously and therefore beat as it should.
Regular exercise strengthens your heart muscle by increasing its efficiency, allowing it to pump blood more effectively with each beat. It also improves circulation, which reduces strain on the heart. Additionally, exercise can lower blood pressure and cholesterol levels, further promoting heart health.
Adult heart beats for 103,680 times and child heart beats between 129,600 and 172,800 times each day.
In the human heart, contraction is initiated by a special modified heart muscle known as sinoatrial node. It is located in the right atrium. The SA node has the inherent power of generating a wave of contraction and controlling the heart beat. Hence, it is known as the pacemaker. Since the heart beat is initiated by the SA node and the impulse of contraction originates in the heart itself, the human heart is termed myogenic. The hearts of vertebrates and molluscs are also myogenic.
Cardiac (heart)