Electrocardiogram An electrocardiogram helps to establish the exact diagnosis and guides treatment, it may reveal: * Abnormal heart rhythms, such as bradycardia (slowed heart rate) * myocardial infarction (ST-elevation MI, STEMI, is usually more dangerous than non-STEMIs; MIs that affect the ventricles are usually more dangerous than those that affect the atria; those affecting the left side of the heart, especially the left ventricle, are usually more dangerous than those affecting the right side, unless that side is severely compromised) * Signs of cardiomyopathy Echocardiography Echocardiography may show poor ventricular function, signs of PED, rupture of the interventricular septum, an obstructed outflow tract or cardiomyopathy. File:UOTW 7 - Ultrasound of the Week 2.Ultrasound showing<unk>  due to myocarditis File:UOTW 7 - Ultrasound of the Week 3.Ultrasound showing<unk>  due to myocarditis Swan-Ganz catheter The Swan–Ganz catheter or pulmonary artery catheter may assist in the diagnosis by providing information on the hemodynamics. Biopsy When cardiomyopathy is suspected as the cause of<unk> , a biopsy of heart muscle may be needed to make a definite diagnosis. Cardiac index If the cardiac index falls acutely below 2.2 L/min/m2, the person may be in<unk> .
Cardiogenic shock
Septic shock
Cryptic shock
Neurogenic shock
Obstructive shock
Spinal shock
Hypovolemic shock
Distributive shock