Miocardiopatía de Tako-Tsubo: una manifestación inusual de feocromocitoma / Takotsubo cardiomyopathy: rare manifestation of pheochromocytoma

Takotsubo cardiomyopathy (MTT) is an acute ventricular dysfunction and reversible in absence of coronary disease. It is a rare presentation of pheochromocytoma and paraganglioma (FPGL). It was described for the first time in 1990 by Sato et al, the physiopathology is not clear yet. It is associated with high levels of catecholamines, vasospasm in the micro vascularization, rupture of atheromatous plaque and myiocarditis. The clinical presentation is similar to an acute myocardial infarction because of that the FPGL must be considered in patients without obstructive coronary lesions. We present a case of a 50 years old women with history of Arterial Hypertension, active smoking and Neurofibromatosis, who is admitted to emergency room with an acute myocardial pain.

Diagnosis and Treatment of Pheochromocytoma / 대한내과학회지

Pheochromocytomas are rare neuroendocrine tumours with a highly variable and heterogeneous clinical manifestation. With a noticeable progress in genetics, biochemical diagnosis and tumour imaging techniques, modifications of the traditional "rule of tens" for pheochromocytomas are inevitable consequence. Diagnosis of pheochromocytoma depends on biochemical evidence of catecholamine production by the tumor. Plasma free metanephrines provide the best test for excluding or confirming pheochromocytoma and should be used as an initial screening tool, but if it is not available, urinary fractionated metanephrines could be used as an alternative method. Different anatomical and functional imaging modalities are used to localize biochemically proven pheochromocytomas. These include computed tomography, magnetic resonance imaging, single-photon emission computed tomography (SPECT) using 123/131I-metaiodobenzylguanidine (MIBG) or 111In-DTPA-pentetreotide and positron emission tomography (PET). Timely laparoscopic tumour removal in combination with appropriate pre-and intraoperative management of the effects of secreted catecholamines are essential components for excellent prognosis.

The changes of plasma angiotensin Ⅱ and cathecholaminesin canine endotoxic shock / 中国病理生理杂志

After injection of endotoxin, the hemodynamic changes, plasma angiotensin (Ag) Ⅱ and cathecholamines (CAs) in dogs were studied. It indicated that the changes of plasma AgⅡ and CAs were most probably compensatory in nature and secondary to the low cardiac output and low peripheral resistance caused by other factors. During the compensatory period, both plasma AgⅡ and CAs were closed to the pre-injection levels. The first peak of plasma CAs was around five minutes, while that of AgⅡ around thirty minutes after injection of endotoxin, it indicated that the changes of plasma AgⅡ was probably secondary to the adrenergic activation.