A 64 year old woman comes to the emergency department because of sudden substernal chest pain and shortness of breath that began after attending her husband's funeral. Electrocardiogram shows ST segment abnormalities and troponin is mildly elevated. Coronary angiography reveals no obstructive coronary artery disease. Echocardiography shows apical ballooning of the left ventricle. Which of the following is the most likely mechanism?
- A)Septic embolization of the coronary arteries
- B)Chronic pressure overload from severe aortic stenosis
- C)Fibrinoid necrosis of small intramyocardial vessels
- D)Immune complex deposition in coronary vessels
- E)Catecholamine mediated myocardial stunningGABARITO
Explicação
Catecholamine mediated myocardial stunning is correct. Takotsubo cardiomyopathy is triggered by intense emotional or physical stress and causes transient systolic dysfunction with apical ballooning in the absence of obstructive coronary disease. The syndrome i... Ver explicação completa e trilha adaptativa →