A Case of Extraadrenal Pheochromocytoma Showed a Transient Oral Captopril Test Positive Result / 영남의대학술지

There have been some case reports of the coexitence of extraadrenal pheochromocytoma and renal artery stenosis. Some reporters proposed that their coexistence may be associated through a common pathophysiological mechanism mediated by catecholamine secretion. Also some noted that trasient renal artery stenosis due to a spasm was induced by the catecholamines released from pheochromacytoma. We report a case of left paraaortic extraadrenal pheochromacytoma that had a transient oral captopril test positive result. After 5 days alpha-antagonist reduced the vasospastic response of catecholamines. After surgical removal of the tumor, plasma catecholamines and urinary vanillymandelic acid concentrations as well as the blood pressure level, were restored to normal.

Captopril na hipertensão arterial leve e moderada resistente a diurético: valor preditivo da eficácia através do teste agudo do captopril / Captopril in mild and moderate arterial hypertension diuretic resistant: acute captopril test to predict treatment efficacy

Objetivo - Estabelecer se a resposta aguda ao captopril pode ser aplicada como teste preditivo de eficácia a longo prazo, no tratamento da hipertensäo arterial de pacientes que näo obtiveram o controle pressórico com diurético. Métodos - Foram estudados 120 pacientes portadores de hipertensäo arterial leve e moderada, näo controlada com 100 mg de hidroclorotiazida. Determinaram-se as variaçöes da pressäo arterial sistólica (PAS), diastólica (PAD) e média durante a administraçäo aguda e crônica do captopril. Procurou-se correlacionar o percentual de queda destas pressöes, obtidas ao final do tratamento, com aquelas obtidas com o teste de captopril, aplicando-se a funçäo discriminante linear (FDL) e o teste do Qui-quadrado com índices preditivos de tratamento. Previamente à aplicaçäo destes testes, subdividiram-se os pacientes em dois grupos de acordo com o percentual de queda da pressäo arterial média )PAM) em grupo de mau desempenho (G1) ou bom desempenho (G2) caso a PAM, respectivamente, apresentasse queda menor ou igual/maior a 159% ao final do tratamento com a associaçäo do diurético e captopril. Resultados - Os autores médios da pressäo arterial durante o período placebo foram 168 ñ 2/109 ñ 1 mmHg. Apos o uso do diurético e a associaçäo com captopril os valores da pressäo arterial foram 151 ñ 1/101 ñ 1 e 137 ñ 1/90 ñ 1 mmHg, respectivamente, valores significativamente diferentes entre si (p < 0,05). A normalizaçäo dos valores pressóricos foi observada em 58% dos pacientes. A FDL calculada apresenta a seguinte equaçäo: FDL = 7,92 queda % PAS + 1,21 queda % PAD. O valor médio para FDL de G1 foi de 192 e para G2 de 361. O valor 276 representa o ponto médio de separaçäo dos dois grupos. Aplicando-se a FDL e o qui-quadrado, as percentagens de acerto para G1 foram, repectivamente, de 80% e 47%. Para o grupo G2, de bom desempenho, a FDL e o qui-quadrado estäo de acordo, respectivamente, em 72 e 77%. Conclusäo - O emprego da funçäo discriminante linear e do qui-quadrado sugerem que o teste do captopril pode ser metodologia auxiliar para selecionar pacientes que näo foram controlados com diuréticos, e que iräo ter benefício com a adiçäo de um inibidor da enzima conversora ao tratamento

Purpose - To evaluate if acute blood pressure response with captopril can be applied as a predictive test of treatment efficacy in hypertensive patients uncontrolled with large dose of diuretics. Methods - Mild and moderate 120 uncontrolled hypertensive patients treated with hydrochlorothiacide 100 mg, were submitted to captopril (25 mg) test. The systolic (SBP) and diastolic (DBP) blood pressure acute and chronic responses were correlated and the linear discriminate function (LDF) and qui-square were applied to test the treatment efficacy. Previously two groups (G) patients were obtained as bad responders (G1) and good responders (G2) respectively, if the mean arterial pressure fall less or equal/more than 15% at the end of the associated treatment with diuretic and captopril. Results - Mean arterial pressure values during placebo were 168 ± 2/109 ± 1 mmHg. This values after diuretic and associated captopril treatment were, respectively, 151 ± 1/ 101 ± 1 and 137 ± 1/90 ± 1 mmHg, all signif cant different (p < 0.05). Blood pressure normalization was obtained in 58% of patients. The calculated LDF formula were: LDF = 7.92 ­ % SBP ± 1.21 D % DBP. The G1 LDF mean value was 192 and 361 to G2. The value 276 represents the separation medium point between both groups. As far the distance from the separation medium point for a calculated LDF for a calculated LDF for a problematic patient, as more will be the probability for this patient to belong to tLis group. LDF and qui-square classified correctly, respectively, 80% and 47% of patients in G1. To G2 good re ponders patients, LDF and qui-square agreed, respectively, in 72 and 77%. Conclusion - The results obtained suggest that captopril test, could be useful as an auxiliary methodology to select hypertensive patients, uncontrolled with diuretic treatment, which might benefit with the association of converting enzyme inhibitors drugs