Juan Arriaga

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BACKGROUND AND PURPOSE The complete removal of the stone is the ultimate goal in management, a result that might not be attained even after several sessions of percutaneous nephrolithotomy (PCNL) and/or extracorporeal shockwave lithotripsy (SWL) and/or retrograde intrarenal surgery (ureteroscopy). The objective of this study is to assess our technique of(More)
In a multicenter, parallel, double-blind study, lisinopril was compared with atenolol in the treatment of mild to moderate essential hypertension. Four hundred ninety patients were randomized to a once-a-day treatment with lisinopril 20 mg or atenolol 50 mg for 4 weeks, and the doses of lisinopril or atenolol were increased up to 80 mg or 200 mg,(More)
It is now well recognised that the renin-angiotensin system plays a key role in the control of blood pressure not only through circulating angiotensin II but through its interaction with the autonomic and central nervous systems. Angiotensin-converting enzyme (ACE) inhibitors have proved to be effective in lowering blood pressure in different types of(More)
M-mode echocardiography proved to be a useful method in the diagnosis of cardiac changes produced by pheochromocytoma. Findings recorded during a hypertensive crisis included systolic anterior movement of the anterior mitral leaflet, paradoxical septal motion, and prominent excursion of the posterior wall. After surgery, early regression of the chronic(More)
Eighteen young nondiabetic patients with chronic renal failure were studied by M-mode echocardiography before and three to 67 weeks after a successful renal transplant. Left ventricular mass (LVM), cardiac output (CO), and stroke work, which were increased before the operation, decreased afterward, in some cases to normal values. Both regression of the LVM(More)
A case with congestive cardiomiopathy and early diastolic closure of the tricuspid valve is presented. This abnormal echocardiographic finding was probably the result of severe tricuspid regurgitation occurring in a restricted right ventricle. The absence of paradoxical septum was determinedly the left ventricular pathology. In this case, echocardiography(More)