Synonyms Tache noire Definition of Eschar An eschar is a local skin lesions coated by a thick coagulated crust or slough that usually results from burn or infection. Causes of Eschar Tick bite fever Scrub typhus Anthrax Tularaemia Spider bites Disseminated fungal infection Post-burn Diagnostic… Read More
Couniaud divided liver into 8 functional segments, each of which is supplied by it’s own portal triad (composed of a portal vein, hepatic artery and a bile duct). Hepatic veins divide the liver in saggital plane: 1. Middle hepatic vein: Divides the liver into right… Read More
In the chapter of cardiac cycle, we have discussed the mechanism of production of heart sounds and their physiologic splitting. First Heart Sound (S1) Mechanism Closure of atrioventricular valves. It is best appreciated in mitral and tricuspid area of chest for respective components. Loud S1… Read More
Summary of Cardiac Cycle Opening and closing of valves When the valve opens, different compartments act as a single chamber (atrio-ventricle or aorto-ventricle). For a blood to flow, pressure in “giver” must be higher then that in “receiver”. Pressure difference opens or closes the valve:… Read More
Norepinephrine has numerous effects in sepsis including veno-constriction (increasing preload), arterial constriction (increasing systemic vascular resistance), positive inotropy, improved cardiac output, and improved renal perfusion. This addresses all the major derangements observed in cases of septic shock. It is important to realize that MAP doesn’t… Read More
