asmr | cardiology explained.

Added: 2026-05-15

[00:00:00]Hi guys, welcome back to my YouTube channel. Today I'm going to be going over cardiology. Cardiology is the branch of medicine that researches and treats diseases of the heart, the blood vessels, and the circulatory system.

[00:00:17]Cardio meaning the heart and logy meaning the study of. A cardiologist is a doctor who specializes in diagnosing and treating heart disease. Some examples of what cardiologists focus on and are heart rhythm heart imaging, heart failure, or things like putting in stents in blocked arteries. The cardiovascular system is basically your body's transport system. The heart pumping is what is keeping all of that transport moving. Your heart is about the size of your fist. It's on your left-hand side underneath the rib cage.

[00:00:53]Even though it is relatively small, it is one of the most hardworking organs in the body. The heart has four chambers, the right atrium, the right ventricle, the left atrium, and the left ventricle.

[00:01:05]Think of the atriums as receiving rooms and then the ventricles as pumping rooms. The right side handles blood going into the lungs and the left side handles blood going into the body.

[00:01:18]There's about seven stages that blood goes through as it's pumping through your body. Stage one is oxygen-poor blood goes from your body to your right atrium. It then moves to the right ventricle. The right ventricle then pumps the blood into the lungs. In the lungs, this is where your blood picks up oxygen. Now, this oxygen-rich blood goes to the left atrium. It then enters the left ventricle. And then the left ventricle pumps the blood through the aorta into the entire body. That cycle repeats over and over and over and over and over and over to keep the blood moving in the correct direction because it's it's going everywhere. The heart uses valves. There's four types of valves. Tricuspid, pulmonary, mitral, and aortic. These valves are like one-way doors, so they only push blood one way and then they shut off. If the valves become damaged or leaky, then blood flow is inefficient. So, the heart doesn't just pump mechanically, it also relies on electricity. Spinal cells are actually the ones that generate this electricity through electrical impulses that control heartbeat timing. The heartbeat starts in the SA node. You can think of this as the heart's natural pacemaker. It sends a signal across the atria to make them contract. That signal is then sent to the AV node. From there, it is sent down to the ventricles and then causes them to contract. This entire process happens in less than a second. Doctors measure this electrical activity through EKGs or ECGs. An ECG helps detect heart attacks, arrhythmias, electrolyte imbalances, and many more heart conditions. Your cardiovascular system is comprised of three major blood vessels. These are arteries, veins, and capillaries. Arteries carry blood away from the heart and veins to the heart.

[00:03:18]You can remember this as A in arteries means away. Capillaries are like these tiny little exchange vessels that send nutrients and oxygen into the tissues.

[00:03:30]The heart itself also needs oxygen, and this is delivered through the coronary arteries. If these become blocked, then the heart begins to die, and this is also known as a heart attack. There are many different types of common heart diseases. For example, hypertension or high blood pressure. This is one of the most common cardiovascular diseases worldwide. Blood pressure is the force of blood pushing against the artery walls. When blood pressure stays too high for too long, it damages blood vessels and organs. Hypertension increases the risk of stroke, heart attack, kidney disease, and heart failure. Many people don't know they have it, which is why it's named the silent killer. Risk factors include smoking, obesity, high salt intake, stress, lack of exercise, and genetics.

[00:04:21]Other common heart diseases are heart failure, arrhythmias, atrial fibrillation, and others. The heart is super cool. It is an incredible biological pump powered by electricity, chemistry, pressure, and timing. If you would like me to go into more diseases like hypertension, maybe into arrhythmias, or any of the others I listed, let me know and I would be happy to do that. Bye.