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Ventricular arrhythmias are usually produced by excess catecholamines and vagal withdrawal and occasionally re-entry and triggered activity also plays a role. PVCs are more common (10 per cent to 40 per cent) in CAD patients than in those without CAD. Ominous PVCs increase the risk of mortality and coronary events to about twice that of the others. Ominous PVCs were defined as multifocal, multiform, repetitive and also ventricular tachycardia. It has also found that those with greater ischaemia (i.e. three vessel disease) had a higher incidence of more serious ventricular arrhythmias. Mc Henry and colleagues reported that 27 per cent of exercise induced ventricular arrhythmias occurred in CAD patients and 7 per cent in those with normal coronary arteries.
Interestingly, Califf and colleagues found a much higher incidence of ventricular arrhythmias among those on digitalis.
P A TTERNS OF CLEAVAGE - Patterns of cleavage depends upon amount of yolk & distribution of yolk. These are following types - 1 . RADIAL CLEAVAGE PATTERN -
#phyletic lineage ..
Parthenogenesis The diploid egg produced in the embryo sacs during diplospory and apospory develops into an embryo without fertilization, thus maintaining the sporophytic lev
Define Carbohydrate metabolism - Ageing? Glucose tolerance may be impaired to some extent. Usually, the fasting blood sugar is normal. The absorption of carbohydrate is not im
Damage to the amygdalas may make a pearson fearless. Gleb Shumyatsky's lab reported in an article in Cell (2005) that knock out mice [mice lacking a specific gene] lacking the gene
Explain the Components of heart sounds? The first major component is associated with mitral valve closure (M 1) and is due to abrupt arrest of the leaflet motion when the cusps
Q. What is the difference between type II diabetes mellitus and type I diabetes mellitus? Type I diabetes also known as insulin-dependent diabetes (as this name is not adequate
Occur in 10 per cent to 40 per cent of all native-valve IE, and complicates aortic IE more commonly than mitral or tricuspid IE. Periannular infection is of even greater concern wi
Indications for Surgery : Congenital pulmonic stenosis is the most common lesion requiring relief. Very rarely it could be due to rheumatic involvement along with disease of othe
One of man's oldest methods of preserving foods is drying or desiccation. The preservation of foods by drying is a direct result of removal of moisture. Microorganisms need water
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