Crowdly

Hypotension refers to a decrease in blood pressure below the level

90/50 mm Hg .

80/40 mm Hg .

110/70 mm Hg .

95/60 mm Hg .

Arterial hypertension refers to an increase in blood pressure above the level

150/95 mmHg .

120/80 mm Hg .

139/89 mm Hg .

160/100 mm Hg .

Why does ventricular fibrillation result in cardiac arrest?

Parasympathetic stimulation depresses the SA node.

The ventricles contract before the atria.

Delayed conduction through the AV node blocks ventricular stimulation.

Insufficient blood is supplied to the myocardium.

The most common cause of a myocardial infarction is:

an imbalance in calcium ions.

an infection of the heart muscle.

atherosclerosis involving an attached thrombus.

a disruption of the heart conduction system.

The basic pathophysiology of myocardial infarction is best described as:

irregular heart rate and force, reducing blood supply to coronary arteries.

total obstruction of a coronary artery, which causes myocardial necrosis.

cardiac output that is insufficient to meet the needs of the heart and body.

temporary vasospasm that occurs in a coronary artery

Coronary insufficiency is

Myocardial damage due to ischemia

Acute compressive pain behind the sternum lasting more than 10 minutes

Mismatch between the level of coronary perfusion and the metabolic needs of the myocardium

Decreased cardiac contractility

The ventricular fibrillation is

tachycardia with a rhythm of 250–300 per minute

chaotic contraction of individual groups of ventricular cardiomyocytes

complete dissociation of contractions of the atria and ventricles

group ventricular extrasystole

Specify the cardiac mechanism of long-term compensation of heart failure

Shortness of breath

Myocardial hypertrophy

Edema

Tachycardia

Consider the relational database schema REGISTRATION (License_id, Car_id, Registered, primary key(License_id, Car_id)), CAR(Car_id primary key, Model, Year, Color). An expression in relational algebra to find out the license id of license holder and the model of the car owned by them can be

Pi license_id, model (car * registration)

Pi license_id, model (registration)

None of these

Pi license_id, model (car)