the heart. description of the heart location: between the lungs more to the left of your chest...
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The Heart
Description of the Heart
Location: Between the lungs More to the left of your chest
Size of the Heart:
12cm in length 8-9cm in width 6cm in thickness
Weight of Heart
Males: 280-340 grams Females: 230-280grams
Functions of the Heart
Four interrelated chambers
1. Right Atrium Receives deoxygenated blood from
the rest of the body via the superior (anterior) and inferior (posterior) vena cava
2. Right Ventricle Receives deoxygenated blood from
right atrium Pumps the deoxygenated blood to the
lungs via the pulmonary vein
3. Left Atrium Receives the oxygenated blood from
lungs via pulmonary veins
4. Left Ventricle Receives oxygenated blood from left
atrium Pumps oxygenated blood to the entire
body via the aorta
Coronary Arteries
Supply blood to the heart muscle Right coronary artery supplies both the left and the right heart Left coronary artery supplies the left heart.
Posterior Heart ArteriesAnterior Heart Arteries
Myocardial Infarction
Also known as heart attack Lack of blood or no blood
traveling to a part of a heart muscle (myocardium) causes the muscle to die
Triggered by: Atherosclerosis
Coronary artery carrying blood to the heart is blocked by build-up of plaque
Coronary artery spasms
Symptoms of a Myocardial Infarction
Uncomfortable feeling of pressure on the chest
Pain may spread to jaw, neck, shoulders, arms or upper abdomen
Nausea and lightheadedness
Acute Myocardial Infarction
Heart Cross Section
Light-colored tissue
indicates a
myocardial
infarction
Normal fatty tissue
Dark area shows
beginning of healing
– increased
blood supply
Old Myocardial Infarctions
Scar tissue
from an infarct at least two
weeks old.
Heart Attack Complications
ArrhythmiasDamaged heart muscle is replaced by scar
tissueDamage caused by heart attack increases
chance of heart failurePericarditis (infection around the lining of
the heart)Pulmonary embolism (blood clot in lungs)