many a times we get to hear that there is a blockage clog in the heart explain this biologically
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Answer:
In heart block, the heart beats irregularly and more slowly than usual, potentially stopping for up to 20 seconds at a time.
This is due to a delay, obstruction, or disruption along the pathway that electrical impulses travel through to make the heart beat. It can result from injury or damage to the heart muscle or heart valves.
Heart block itself does not usually need direct treatment, but related underlying health conditions do.
A healthy human heart beats at about 60 to 100 times a minute. A heartbeat is one contraction of the heart muscles, which pushes blood around the body.
Normally, every heart muscle contraction is controlled by electrical signals that travel from the atria, or the upper chambers of the heart, to the ventricles, or the lower chambers.
A partial heart block happens when the electrical impulses are delayed or stopped, preventing the heart from beating regularly.
A complete heart block is when the electrical signals stop completely. The heartbeat will drop to about 40 times per minute.
Even changes to impulses that last only a fraction of a second can cause heart block.
Sometimes, a heart block makes it difficult for the heart to pump blood properly through the circulatory system, so the muscles and organs, including the brain, do not get enough oxygen to function properly.
Heart block typically causes lightheadedness, fainting, and palpitations. Depending on the severity of the heart block, this can be dangerous. For example, a third-degree heart block can worsen pre-existing conditions, such as heart failure. It can cause loss of consciousness and even sudden cardiac arrest. There can also be chest pain.
Coronary heart disease, on the other hand, occurs when a waxy substance, called plaque, builds up in the coronary arteries. It can cause chest pain, known as angina, or heart attack, also called myocardial infarction (MI).
blood pressure is increasing instead so we feel like blockage clog in the huart