51 Facts About Human heart

In humans, the heart is approximately the size of a closed fist and is located between the lungs, in the middle compartment of the chest.

In humans, other mammals, and birds, the heart is divided into four chambers: upper left and right atria and lower left and right ventricles.

The Human heart is enclosed in a protective sac, the pericardium, which contains a small amount of fluid.

The wall of the Human heart is made up of three layers: epicardium, myocardium, and endocardium.

The Human heart beats at a resting rate close to 72 beats per minute.

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Diagnosis of Human heart disease is often done by the taking of a medical history, listening to the Human heart-sounds with a stethoscope, ECG, echocardiogram, and ultrasound.

Human heart is situated in the mediastinum, at the level of thoracic vertebrae T5-T8.

The upper part of the Human heart is the attachment point for several large blood vessels—the venae cavae, aorta and pulmonary trunk.

The upper part of the Human heart is located at the level of the third costal cartilage.

Largest part of the Human heart is usually slightly offset to the left side of the chest and is felt to be on the left because the left Human heart is stronger and larger, since it pumps to all body parts.

The Human heart is cone-shaped, with its base positioned upwards and tapering down to the apex.

Middle layer of the Human heart wall is the myocardium, which is the cardiac muscle—a layer of involuntary striated muscle tissue surrounded by a framework of collagen.

The foramen ovale allowed blood in the fetal Human heart to pass directly from the right atrium to the left atrium, allowing some blood to bypass the lungs.

Right Human heart collects deoxygenated blood from two large veins, the superior and inferior venae cavae.

Blood is ejected from the Human heart, causing the pressure within the ventricles to fall.

The force of each contraction of the Human heart muscle is proportional to the preload, described as the Frank-Starling mechanism.

Normal rhythmical Human heart beat, called sinus rhythm, is established by the Human heart's own pacemaker, the sinoatrial node .

Normal resting Human heart rate is called the sinus rhythm, created and sustained by the sinoatrial node, a group of pacemaking cells found in the wall of the right atrium.

The resting Human heart rate of a newborn can be 129 beats per minute and this gradually decreases until maturity.

Normal sinus rhythm of the Human heart, giving the resting Human heart rate, is influenced by a number of factors.

Many other medical professionals are involved in treating diseases of the Human heart, including doctors, cardiothoracic surgeons, intensivists, and allied health practitioners including physiotherapists and dieticians.

Coronary artery disease, known as ischaemic Human heart disease, is caused by atherosclerosis—a build-up of fatty material along the inner walls of the arteries.

Patients with Human heart failure are at higher risk of developing dangerous Human heart rhythm disturbances or arrhythmias.

In some parts of the world rheumatic Human heart disease is a major cause of valvular Human heart disease, typically leading to mitral or aortic stenosis and caused by the body's immune system reacting to a streptococcal throat infection.

Some arrhythmias cause the Human heart to beat abnormally slowly, referred to as a bradycardia or bradyarrhythmia.

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The most dangerous form of Human heart racing is ventricular fibrillation, in which the ventricles quiver rather than contract, and which if untreated is rapidly fatal.

Sac which surrounds the Human heart, called the pericardium, can become inflamed in a condition known as pericarditis.

Some congenital Human heart defects allow blood that is low in oxygen that would normally be returned to the lungs to instead be pumped back to the rest of the body.

Murmurs are graded by volume, from 1, to 6, and evaluated by their relationship to the Human heart sounds, position in the cardiac cycle, and additional features such as their radiation to other sites, changes with a person's position, the frequency of the sound as determined by the side of the stethoscope by which they are heard, and site at which they are heard loudest.

Several imaging methods can be used to assess the anatomy and function of the Human heart, including ultrasound, angiography, CT, MRI, and PET, scans.

An echocardiogram is an ultrasound of the Human heart used to measure the Human heart's function, assess for valve disease, and look for any abnormalities.

CT scans, chest X-rays and other forms of imaging can help evaluate the Human heart's size, evaluate for signs of pulmonary oedema, and indicate whether there is fluid around the Human heart.

Diseases affecting the Human heart can be treated by a variety of methods including lifestyle modification, drug treatment, and surgery.

Pacemakers, comprising a small battery powered generator implanted under the skin and one or more leads that extend to the Human heart, are most commonly used to treat abnormally slow Human heart rhythms.

The Human heart did not pump blood around, the Human heart's motion sucked blood in during diastole and the blood moved by the pulsation of the arteries themselves.

Human heart's work was later translated into Latin by Andrea Alpago.

Tawara's discovery of the atrioventricular node prompted Arthur Keith and Martin Flack to look for similar structures in the Human heart, leading to their discovery of the sinoatrial node several months later.

The first human to human heart transplantation was performed in 1967 by the South African surgeon Christiaan Barnard at Groote Schuur Hospital in Cape Town.

Louis Washkansky, the first recipient of a donated Human heart, died 18 days after the operation while other patients did not survive for more than a few weeks.

Since 1948, the ongoing Framingham Heart Study has shed light on the effects of various influences on the Human heart, including diet, exercise, and common medications such as aspirin.

The ib or metaphysical Human heart was believed to be formed from one drop of blood from the child's mother's Human heart, taken at conception.

Chinese character for "Human heart", ?, derives from a comparatively realistic depiction of a Human heart in seal script.

In Chinese medicine, the Human heart is seen as the center of ? shen "spirit, consciousness".

The Human heart is associated with the small intestine, tongue, governs the six organs and five viscera, and belongs to fire in the five elements.

Sanskrit word for Human heart is hrd or hrdaya, found in the oldest surviving Sanskrit text, the Rigveda.

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The Aztec believed that the Human heart was both the seat of the individual and a fragment of the Sun's heat .

In Catholicism, there has been a long tradition of veneration of the Human heart, stemming from worship of the wounds of Jesus Christ which gained prominence from the mid sixteenth century.

The familiar iconography of Cupid shooting little Human heart symbols is a Renaissance theme that became tied to Valentine's day.

In reptiles, other than snakes, the Human heart is usually situated around the middle of the thorax.

Fish have what is often described as a two-chambered Human heart, consisting of one atrium to receive blood and one ventricle to pump it.

Only the chordates and the hemichordates have a central "Human heart", which is a vesicle formed from the thickening of the aorta and contracts to pump blood.