Biology Questions and Answers
- What are the main
degenerative diseases of the
heart?
The main dheart are heart failuregenerative de, arrhythmias,iseases of the
valvular hinsufficiency aeart diseases, corond myocardial infarction.nary
- What is coronary disease?
Coronary disease, or coronary
insufficiency, is a dis total or partial obstruction oisease in which f one orthere
more of the arteries that irrigate the
heart mthe coronary arteriusculature, i.e., es. The disease isobstruction o f
formed by slow and gradual formation
of atheroma pcoronaries. The fatty plaques grow andlaques inside the (^)
block the flow of blood, a process known
as atherosclerosisarteriosclerosis which (do not confuse withis the hardening
of the arteries generally cause by
chronic high blood pressure).
The main risk factors fodisease are tobacco smokinr coronaryg, diabetes (^)
mellitus, hypertension,
hypercholesterolcholesterol and low emia (hilevel of goodgh level of bad
cholesterol), stress, alcoholism and
sedentary lifestyle.
Coronary disease may present in two
manners, as angina pectoris omyocardial infarction. If the artr aserial (^)
obstruction is not complete and
extensive tpain (angina pectoris), mainly whe patient often feels chesthen
performing physical exercise or in any
situation woxygen. If the obstruction ohen the heart needs moref one or
more coronaries is complete or blood
cannot irrigate some regions of the
heart minfarction occurs anuscle (myocardium) d the muscle cells ofthe (^)
the affected area die.
- What is myocardial
infarction?
Myocardial infarction is the condition in
which an heart muscle dies by hypoxia darea of this tissue or the entireue to
lack of blood irrigation. Myocardial
infarction isthe dependence of its exte a severe disease sincnsion the one
heart can fail, i.e., it can no longer
pump blood to the or it can even stop beating lungs or to the (causingbody
death).
The main cause of myocardial infarction
is coroarteries that carry arterial blnary obstruction, blockinood to theg of the
heart muscle. Other events like
hemodynamic shock (circulationstoppage due to large hemorrhages, for (^)
example) can also cause myocardial
infarction.
- What is coronary bypass
graft?
Coronary surgical myocardialartery bypass graft is a revascularization,kind of
i.e., a way to provide blood to a
myocarimpaired dium wor blocked due to corohose blood supply isnary (^)
disease. In this surgical treatment of
coronary disvessel grafts takeease on from othne or more blooder parts of (^)
the body are used to join the obstructed
artery with the aorta or other healthy cor(in a region after the obstruction)onary (^)
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