The heart will compensate this by pumping faster and stronger. Thereby maintaining enough circulation until this compensation is not enough. This point is called decompensation. Also by valve disorders, myocarditis, hypertension and severe rhythm disorders. Morphine inhibits the respiratory control center.
Respiratory frequency is decreased.
Digitalis improves the contraction force of the heart. Diuretics decreases circulatory volume. Nitrobaat and Cedocard decreases pre-load by dilating the venous bloodvessels. Nipride, Minipress and Adalat decreases after-load by decreasing the peripheral vascular resistance. A tamponade is a disturbed pump function of the heart as a result of an increased intrapericardial pressure.