RESUMEN
In arterial hypertension besides reducing blood pressure, we should think about the circadian pressure profile that the patient presents, since the patients non depressors (not descent of arterial pressure during the night with regard to the day) (non-dipper) they associate to a worse cardiovascular prognosis. The purpose of the present study was to determine the circadian pressure profile in patient treated arterial hypertension and never previously treated with antihypertensive medication; and its relationship with the organic damage. They were included in the study to 702 patients with clinical indication for 24 hour ambulatory blood pressure monitoring. The 39% was dipper, 2% extreme dipper, 49.6% non-dipper and 9.4% riser. The patient non dipper had bigger levels of 24 hours systolic blood pressure, night blood pressure and bigger organic damage. The main factors associated to this pattern were the clinic systolic blood pressure, obesity and overalls a filtrate smaller glomerular to 60 ml/min.
Asunto(s)
Ritmo Circadiano , Hipertensión/fisiopatología , Adulto , Presión Sanguínea , Femenino , Humanos , Masculino , Persona de Mediana EdadRESUMEN
BACKGROUND: The clonidine test has been proposed as diagnostic biochemical test for patients with clinical suspicion of pheochromocytoma. METHODS: The clonidine test was used in 80 patients with suspicion of pheochromocytoma (on account of suggestive clinical findings, increased levels of metanephrines, increased plasma or urinary levels of catecholamines, or suggestive images by ultrasonography or CT). RESULTS: Surgery confirmed the diagnosis of pheochromocytoma in 16 patients. The highest sensitivity (62%) and specificity (46%) of the clonidine test corresponded to a brake degree of 5%, with a predictive negative value of 83%. The test was most useful in patients with increased basal plasma values of catecholamines (sensitivity, 62%; specificity, 66%). CONCLUSIONS: The clonidine test can be useful for the diagnosis of pheochromocytoma in patients with increased basal plasma levels of catecholamines and a brake degree lower than 5% at 180 minutes.
Asunto(s)
Neoplasias de las Glándulas Suprarrenales/diagnóstico , Clonidina , Feocromocitoma/diagnóstico , Neoplasias de las Glándulas Suprarrenales/metabolismo , Adulto , Catecolaminas/sangre , Femenino , Humanos , Masculino , Persona de Mediana Edad , Feocromocitoma/metabolismo , Sensibilidad y EspecificidadRESUMEN
Twenty patients with the diagnosis of pheochromocytoma were studied from January 1990 to January 1998. Nineteen patients had a pathologic investigation performed. The mean age of patients was 49 +/- 16 years (range: 24-71 years), 8 males and 12 females. Nine cases corresponded to adrenal and eleven to extra-adrenal (paragangliomas) pheochromocytomas. The anatomic location was similar in both adrenal glands and for paragangliomas the cervical location predominated. The most consistent clinical finding in our patients was maintained arterial hypertension, followed by headache, palpitations and flushing. Biochemically, an increase in urine catecholamine levels or their metabolites was found in 82.2%. The clonidine test was very useful, particularly for cases where biochemical results were discrepant. CT, NMR and gammagraphy with 123I-MIBG have a high sensitivity for locating pheochromocytomas. NMR and gammagraphy with 111In-pentetreotide located cases in which CT or 123I-MIBG were negative. Preoperative treatment with adrenergic alpha-blockers allowed to surgery with no arterial tension complications. Only one patient with multiple abdominal paragangliomas relapsed. No differences regarding clinical manifestations, biochemical parameters or imaging studies were found between pheochromocytomas and paragangliomas, except their location.