Heart

The term for tissue death is either necrosis or apoptosis, depending on the situation. Apoptosis is preprogrammed tissue death, while necrosis is not preprogrammed. An infarct is an area of tissue that has died due to lack of blood supply.

A person who suffers from cardiac arrest will faint at the same time or withing 1-2 seconds after suffering from cardiac arrest. There are different forms of cardiac dysrhythmias that a person can suffer from: Ventricular Tachycardia- is when the ventricles of the heart beat very rapidly and without much efficiency, a person can still be conscious while in ventricular tachycardia and live for hours in this rhythm. Eventually this rhythm will be fatal as not enough blood flow will be delivered to vital organs. Ventricular Fibrillation- is when the ventricles just "quiver" erratically and unable to produce a palpable pulse and a patient presenting in this rhythm will be unconscious although agonal respirations might still be noted. On an EKG this rhythm appears to look like a seismograph when an earthquake is happening, very erratic and inconsistent. Asystole- This is the final rhythm of cardiac arrest and exhibits no electrical activity of the heart. 99% of patients will not initially present in this rhythm as they usually progress from VT or VF into asystole. A patient in asystole on a EKG would show a "flatline" or no electrical activity of the heart.

They are the 2 chambers on the top, the atria. The right atrium takes venous blood from the body, and the left atrium collects blood coming from the lungs where it has been oxygenated. The serious pumping happens in the ventricles, the 2 chambers below the atria. The right ventricle pumps the blood to the lungs, and the left ventricle pumps the blood out into the body, both pumping at the same time. This is the basic blood pathway: The blood can be traced from the body tissues to the capillaries, venules, and veins. At the the biggest vein the Vena Cavae, it then goes into the heart's -- Right Atrium-- Right Ventricle-- Then the Lungs to pick up oxygen -- Left Atrium-- Left Ventricle-- Into the Aorta, the largest artery, and then throughout the body by way of the rest of the arteries, arterioles, capillaries, and then, finally, back into the body tissues again, but now carrying oxygen.

brain to the spinal cord through the brachial plexus to ulnar nerve to little finger

- Muscles require oxygen to function - When running, you are working muscles - Blood carries oxygen, the heart pumps blood When running, as the muscles require more oxygen to work harder, the heart must pump blood around your body quicker, delivering more oxygen to the muscles that require it. The way that the heart does this is to increase heart rate.

Cardiac output is subject to several factors, any of which will have bearing on out put.

First, is the health of the left ventricle, which will push, via a contractual squeezing of the ventricle, a volume of blood, out of the heart. If the left ventricle has been impaired, ie. damage secondary to heart attack, infection, pericardial effusion( fluid in the sac surrounding the heart) valvular dysfunction, rare tumor and some connective tissue diseases. Any or a combination of these will alter the effectiveness of the pump( left ventricle)

Second, filling the left ventricle, via pulmonary circulation being pumped by the right ventricle, will have bearing on output. If there is high resistance in the pulmonary circulation or impairment of the right ventricle the pump does not prime

You essentially have a filling problem.

Medulla.

A normal heart beat generally consists of 2 distinct heart sounds, informally termed 'lub' and 'dub'. The first heart sound (lub) occurs at the beginning of the heart contraction (systole) and is the sound of the valves between the atria and ventricles closing. The second heart sound (dub) occurs at the end of the contraction, and is the sound of the valves between the major arteries and the ventricles closing.

Cardiac output is the amount of blood pumped by each ventricle in one minute. Stroke volume is the amount of blood pumped by each ventricle with each heartbeat. If you need a specific number: stroke volume x heart rate = Cardiac output

Preventing rejection of an artificial heart primarily involves the use of immunosuppressive medications to inhibit the body's immune response against the foreign device. Patients are typically prescribed a regimen that includes drugs like corticosteroids and calcineurin inhibitors. Additionally, careful monitoring for signs of rejection and regular follow-up appointments are essential to manage any potential complications. Ongoing research also aims to improve biocompatibility and integrate technologies that can minimize rejection risks further.

No,because everyone of us don't have the same size of heart.....

Yes in moderation.

The heart.

Sino Auricular Node & Sino ventricular Node

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The lower two chambers of the heart which pump blood to the atria

The pulse is the feeling of an artery caused by the movement of blood from the heart. If the heart stops, there will be no pulse. A common mistake in first aid is to use ones thumb to take a pulse. There is a major blood vessel that goes through the thumb. If a person were to try to take a pulse with their thumb rather than the first two fingers, the person taking the pulse would be registering their own heartbeat rather than that of the victim.

The heart cavity is divided down the middle into a right and a left heart, which in turn are subdivided into two chambers. The upper chamber is called an atrium (or auricle), and the lower chamber is called a ventricle. The two atria act as receiving chambers for blood entering the heart; the more muscular...

The first experimental artificial heart was the Jarvik 7 named for project manager Robert Jarvik. It was implanted in Dr. Barney Clark in 1981 who lived for 112 days with the heart.

The first FDA approved artificial heart was the Total Artificial Heart (TAH-t) created by CardioWest in 2004.

Valves in the heart help to keep the blood flowing in the right direction.

ALL The Typical/Usual Endotherms, (birds and mammals) have 4 chambered hearts, the atypical/unusual few reptiles and fish that fall into the category DO NOT have 4 chambered hearts. Bird & Mammal hearts have 4-Chambers; Right and Left Atria & Right and Left Ventricles. Having Hair or Feathers indicates the animal is endothermic (at all times), because ONLY Birds and Mammals fall this category.

Both ventricular contraction and atrial diastole take place.

You can't live without a heart because your heart pumps the blood around your body in circulation and if you didn't have a heart you would die because there would be nothing to pump your blood around you. <~ that's my theory :)

Cardiac muscle makes up the wall of the heart. It contracts to pump blood around the body. Smooth muscle is found in the walls of all hollow organs except the heart.

There are layers to the wall are myocardium, epicardium and andocardium. The heart is covered by a protective sack called the pericardium.

The wall protects the heart and makes it contract and relax.