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  • Renin  (8)
  • Captopril  (5)
  • Cushing-Syndrom  (2)
  • Mittlerer arterieller Blutdruck
  • Springer  (17)
  • American Chemical Society
  • American Heart Association (AHA)
  • Nature Publishing Group (NPG)
  • Oxford University Press
  • Periodicals Archive Online (PAO)
  • 1985-1989  (2)
  • 1980-1984  (4)
  • 1975-1979  (7)
  • 1970-1974  (4)
  • 1935-1939
  • 1925-1929
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  • Springer  (17)
  • American Chemical Society
  • American Heart Association (AHA)
  • Nature Publishing Group (NPG)
  • Oxford University Press
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  • 1985-1989  (2)
  • 1980-1984  (4)
  • 1975-1979  (7)
  • 1970-1974  (4)
  • 1935-1939
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 64 (1986), S. 327-332 
    ISSN: 1432-1440
    Keywords: Severe hypertension ; Minoxidil ; Captopril
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The antihypertensive efficacy of minoxidil and captopril was compared in 23 males with essential or renal parenchymatous hypertension refractory to conventional antihypertensive drug therapy. Following a pretreatment period the patients were randomly assigned to receive either minoxidil, 2.5 mg twice daily (n=12), or captopril, 25 mg twice daily (n=11). In patients with diastolic blood pressure 〉95 mmHg, doses of minoxidil and captopril were increased in 2-week intervals. Patients who maintained diastolic pressure 〉95 mmHg and/or those with intolerable side effects were switched over to the alternative substance. After a mean observation period of 12 weeks a significant decrease in systolic and diastolic blood pressure was observed (179/114 vs 148/92 mmHg in the minoxidil group; 176/111 vs 158/97 mmHg in the captopril group). The primary response rate was 75% in patients treated with minoxidil and 55% in those with captopril (not significant). After the change to the alternative substance two of the four non-responders on captopril and one of the two non-responders on minoxidil became responders. Side effects occurred significantly more often during minoxidil than captopril (p〈0.05). The high efficacy of minoxidil and captopril in the treatment of severe hypertension refractory to conventional drugs was confirmed. Minoxidil lowered blood pressure slightly more than captopril, but it had a higher incidence of side effects than captopril.
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 62 (1984), S. 855-858 
    ISSN: 1432-1440
    Keywords: Cushing's syndrome ; Pathogenesis of hypertension ; Renin angiotensin system ; Captopril
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To analyse the role of the renin angiotensin system in the pathogenesis of hypertension in Cushing's syndrome ten patients with hypercorticism (five with pituitary hypothalamic dysfunction, three with adrenal adenomas and two with adrenal carcinomas) received a single oral dose of 25 mg captopril. Mean arterial pressure was then determined at short intervals over periods of up to 240 min. Plasma renin activity (PRA) was measured immediately before the administration of captopril. Eleven patients with severe essential hypertension, who showed a comparable distribution of basal PRA values, served as a control. Patients with elevated basal PRA values (〉3 ng/ml·3 h) showed, both in the subgroup of cases with essential hypertension and in that with Cushing's syndrome, a statistically significant fall (P〈0.05−P〈0.001) in mean arterial pressure, the decrease being slightly more pronounced in essential hypertensives. On the other hand patients with normal PRA values (≦3 ng/ml·3 h) exhibited only a minor fall in mean arterial pressure reaching statistical significance (P〈0.05) only after 60 min (essential hypertension) and 180 min (Cushing's syndrome), respectively. Our results document that in patients with Cushing's syndrome the effect of captopril seems to be determined by the activity of the renin angiotensin system. Thus, in a substantial number of patients with hypercorticism, the renin angiotensin system may be an important factor in the pathogenesis of hypertension, whereas in patients with low PRA values other factors like oversecretion of mineralocorticoids may be responsible for the observed blood pressure increases.
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  • 3
    ISSN: 1432-1440
    Keywords: Captopril ; Kidney function ; Essential hypertension ; Renovascular hypertension ; Renal parenchymatous hypertension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To study long-term effects of captopril on renal function in patients with various forms of severe hypertension, serum creatinine values were monitored in 76 patients under captopril therapy over a period of up to 3 years. Three different groups were formed: (1) patients with essential hypertension (n=37); (2) patients with renovascular hypertension (n=20); (3) patients with renal parenchymatous hypertension (n=19). In each of the three groups reduction in blood pressure was accompanied by increases in serum creatinine. However, both changes were more pronounced in patients with renovascular hypertension. In this group only the rise in creatinine was statistically significant and showed a slight progression with duration of captopril treatment. Group specific analysis revealed that the increase was smaller in patients with unilateral (n=16) renovascular disease than in those with bilateral (n=4) involvement, but in the former it was still significantly higher than in patients with essential or renal parenchymatous hypertension. Separation of patients according to the underlying disease of renovascular hypertension showed that renal function deteriorated less in patients with arteriosclerotic origin (n=10) than in those with fibromuscular dysplasia (n=8). Statistical evaluation of subjects with renovascular and essential hypertension still revealed significant differences in creatinine when the patients with initial plasma renin activity (PRA) below and above 6 ng/ml·3 h were compared separately. A significant correlation (r=0.73;P〈0.05) between blood pressure reduction and creatinine changes was obtained only for patients with renovascular hypertension. Finally, in all three groups of patients creatinine changes were statistically independent from daily dosages of captopril. From these data we conclude that sustained impairment of kidney function by captopril is mainly restricted to patients with renovascular hypertension and possibly results from the combined effects of low renal perfusion pressure and interference with intrarenal regulation of glomerular filtration rate by a postulated angiotensin-II-mediated mechanism.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 63 (1985), S. 361-363 
    ISSN: 1432-1440
    Keywords: Primary aldosteronism ; Captopril ; Spironolactone ; Renin-angiotensin ; Converting-enzyme ; Secondary hypertension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In three patients with primary aldosteronism, the acute effect of a single dose of captopril on the elevated mean arterial blood pressure (MAP) was studied before and after 4 weeks of treatment with spironolactone. Before spironolactone therapy, captopril did not cause any drop in MAP. Four weeks later, after an oral daily dose of 400 mg spironolactone, MAP was still elevated in all three patients, though electrolyte abnormalities were fully corrected. Since plasma renin activity (PRA) was increased to values above the normal range, the acute effect of captopril on MAP was tested again. A single dose of 25 mg captopril then caused a fall in MAP to normal. These data reveal the conversion from a renin-independent to a renindependent kind of hypertension after spironolactone therapy in three patients with primary aldosteronism syndrome. This might be of pathogenetic and therapeutic interest.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 52 (1974), S. 719-721 
    ISSN: 1432-1440
    Keywords: Aldosterone ; renin ; pheochromocytoma ; Aldosteron ; Renin ; Phaechromocytom
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Sieben von 8 Patienten mit einem Phäochromocytom zeigten eine über die Norm erhöhte Plasma-Renin-Aktivität (〉3 ng/ml/3 h). Bei 4 der 7 Patienten mit Hyperreninismus konnte gleichzeitig auch ein abnorm hohes Plasma-Aldosteron nachgewiesen werden (〉120 pg/ml). Seitengetrennte Bestimmungen der Plasma-Renin-Aktivität im Nierenvenenblut zweier Patienten zeigten, daß als Ursachen des Hyperreninismus sowohl eine Verringerung der Nierendurchblutung durch Tumorkompression im Sinne eines Goldblattmechanismus als auch eine Stimulation der renalen Reninsekretion durch Katecholamine in Frage kommen können. Bei 2 unserer Patienten mit einem Phäochromocytom fand sich eine über die Norm gesteigerte Cortisolsekretion.
    Notes: Summary Seven of eight patients with pheochromocytoma showed elevated plasma renin activity (〉3 ng/ml/3 hr). Four of these seven patients simultaneously had abnormally high plasma aldosterone (〉120 pg/ml). It was found by selective determinations of plasma renin activity in both renal veins that two different mechanisms may be responsible for the observed hyperreninism. Firstly, the pheochromocytoma can lead mechanically to a reduction in renal blood flow inducing an increased renin secretion. Secondly, catecholamines are known to stimulate renin secretion. Two of the eight patients with pheochromocytoma showed an increased cortisol secretion.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 53 (1975), S. 391-393 
    ISSN: 1432-1440
    Keywords: Aldosteron ; Renin ; Spironolacton ; Primärer Aldosteronismus ; Aldosterone ; renin ; spironolactone ; aldosteronism primary
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary In a patient suffering from Conn's syndrome analysis of short-time fluctuations of plasma aldosterone, plasma cortisol and plasma renin activity were performed before and after a 9-months therapy period with spironolactone. Under the former conditions aldosterone was secreted episodically and a highly significant correlation was found between plasma aldosterone and plasma cortisol (r=0.817,p〈0.001) while plasma renin activity was undetectable (〈0.16 ng/ml/3 hr). Following a 9-months therapy with spironolactone episodic secretion of aldosterone and the significant correlation between aldosterone and cortisol persisted (r=0.819,p〈0.001) in the presence of an abnormally high plasma renin activity. First, when the secretion of ACTH was suppressed by dexamethasone a weak correlation was found between renin activity and aldosterone (r=0.517,p〈0.05). Our results show that both before and after a 9-months therapy with spironolactone episodic aldosterone release of an aldosterone producing adrenal adenoma was mediated through ACTH and that endogeneous angiotensin II had no or only little influence.
    Notes: Zusammenfassung Bei einer Patientin mit Conn Syndrom wurden vor und nach einer 9-monatigen Behandlung mit Spironolacton Plasma-Aldosteron, Plasma-Cortisol und Plasma-Renin-Aktivität in kurzen Zeitabständen bestimmt. Vor Behandlung wurde Plasma-Aldosteron episodisch sezerniert; es fand sich eine hochsignifikante Korrelation zwischen Plasma-Aldosteron und Plasma-Cortisol (r=0.817,p〈0.001). Die Plasma-Renin-Aktivität lag ständig unterhalb des aufdeckbaren Meßbereiches (〈0,16 ng/ml/3 h). Nach 9-monatiger Behandlung mit Spironolacton war in Gegenwart einer deutlich über der Norm erhöhten Plasma-Renin-Aktivität sowohl eine episodische Sekretion des Plasma-Aldosterons als auch eine signifikante Korrelation zwischen Plasma-Aldosteron und Plasma-Cortisol nachweisbar (r=0.819,p〈0.001). Erst nach Suppression der ACTH-Sekretion durch Dexamethason fand sich eine schwache K orrelation zwischen Renin-Aktivität und Aldosteron (r=0.517,p〈0.05). Unsere Ergebnisse zeigen, daß sowohl vor als auch nach 9-monatiger Behandlung mit Spironolacton die episodische Sekretion des Plasma-Aldosterons bei einer Patientin mit einem aldosteronproduzierenden Nebennierenrindenadenom durch ACTH gesteuert wird. Demagegenüber besitzt endogenes Angiotensin II keinen oder einen nur geringen Einfluß auf die Aldosteron-Sekretion.
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  • 7
    ISSN: 1432-1440
    Keywords: Cushing-Syndrom ; Hypertonie ; Renin-Aktivität ; Aldosteronismus ; Cushing's syndrome ; Hypertension ; Renin activity ; Aldosteronism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary To investigate the role of the renin angiotensin system in the pathogenesis of hypertension in Cushing's syndrome two patients with hypercorticism were infused with 20 mg saralasin (1-sar-8-alaangiotensin II) over a period of 30 minutes under constant blood pressure control. In addition, one patient with primary aldosteronism, an established form of mineralocorticoid hypertension, served as control. Neither in the two patients with Cushing's syndrome nor in the patient with primary aldosteronism could a blood pressure lowering effect of saralasin be observed. In the two patients with hypercorticism both renin activity and plasma aldosterone increased during saralasin infusion. The patient with primary aldosteronism only showed a weak increase in plasma aldosterone concentration. These results seem to exclude an important role of the renin angiotensin system in the pathogenesis of hypertension in Cushing's syndrome. The unresponsiveness of elevated blood pressure to saralasin in the two patients with hypercorticism and in the patient with primary aldosteronism indirectly supports the assumption that in patients with Cushing's syndrome increased mineralocorticoid activity may be the main factor in the pathogenesis of hypertension.
    Notes: Zusammenfassung Um die Bedeutung des Renin-Angiotensin Systems in der Pathogenese der Hypertonie bei Cushing-Syndrom zu untersuchen, wurden bei 2 Patienten mit Hyperkortizismus 20 mg Saralasin (1-Sar-8-Ala-Angiotensin II) über einen Zeitraum von 30 min unter ständiger Blutdruckkontrolle infundiert. Zusätzlich diente ein Patient mit primärem Aldosteronismus, einer etablierten Form von Mineralokortikoidhochdruck, als Kontrolle. Weder bei den 2 Patienten mit Cushing-Syndrom noch bei dem Patienten mit primärem Aldosteronismus ließ sich ein blutdrucksenkender Effekt des Saralasins nachweisen. Die beiden Patienten mit Hyperkortizismus zeigten unter Saralasin sowohl einen Anstieg der Renin-Aktivität als auch des Plasmaaldosterons. Bei dem Patienten mit primärem Aldosteronismus ließ sich nur ein geringgradiger Anstieg der Plasmaaldosteronkonzentration nachweisen. Diese Ergebnisse sprechen gegen eine wichtige Rolle des Renin-Angiotensin Systems in der Pathogenese der Hypertonie bei Cushing-Syndrom. Die Unbeeinflußbarkeit des Hochdrucks durch Saralasin bei den beiden Patienten mit Hyperkortizismus und dem Patienten mit primärem Aldosteronismus stützen indirekt die Annahme, daß bei Patienten mit Cushing-Syndrom eine erhöhte Mineralokortikoidaktivität der Hauptfaktor in der Pathogenese der Hypertonie ist.
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  • 8
    ISSN: 1591-9528
    Keywords: Mean arterial blood pressure ; Heart rate ; Renal transport system ; Mittlerer arterieller Blutdruck ; Herzfrequenz ; Renales Transportsystem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei der narkotisierten vagotomierten Ratte wurde über 2 Std die Wirkung von intraperitoneal injiziertem Guancydin auf den mittleren arteriellen Blutdruck und die Herzfrequenz beobachtet. Hier konnte ein dosisabhängiger blutdruck- und frequenzsenkender Effekt nachgewiesen werden. Nephrektomierte Tiere oder Tiere mit doppelseitiger Ureterligatur und ureteroabdomineller Fistel sowie Tiere, die mit Probenecid vorbehandelt waren, zeigten im Vergleich zu den Normaltieren eine deutlich stärkere Ansprechbarkeit auf die gleiche Guancydindosis. 2 Std nach der Guancydingabe konnte zwischen den Blutdruckwerten der vorbehandelten Kollektive und dem mittleren Druckwert des Normalkollektivs eine hochsignifikante Differenz ermittelt werden (p〈0,001). Aus diesen Befunden wird gefolgert, daß Guancydin rasch durch die Nieren ausgeschieden wird und daß auf Grund der deutlichen Potenzierung der Guancydinwirkung durch Probenecid eine aktive Ausscheidung des Antihypertensivums in der Niere wahrscheinlich ist.
    Notes: Summary In anesthetized and vagotomized rats the effect of intraperitoneally injected guancydine on the mean arterial blood pressure and heart rate was observed over a time of 2 hrs. A dose-dependent hypotensive and heart rate lowering effect could be recorded. Nephrectomized animals or animals with bilateral ureteral ligature and ureteroabdominal fistula and animals, which were pretreated with probenecid, showed a significantly increased sensitivity to guancydine compared to the normal rats. 2 hrs after application of guancydine a highly significant difference could be observed between the mean blood pressure of the pretreated and the normal animals (p〈0.001). These results suggest, that guancydine is rapidly excreted through the kidneys, and that the secretion of this antihypertensive agent is an active process.
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  • 9
    ISSN: 1591-9528
    Keywords: Mean arterial blood pressure ; Heart rate ; Renal transport system ; Mittlerer arterieller Blutdruck ; Herzfrequenz ; Renales ; Transportsystem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei Ratten, die mit Furosemid oder Mefrusid vorbehandelt worden waren, wurde über einen Zeitraum von 2 Std die Wirkung von intraperitoneal injiziertem Guancydin (25 mg/kg) auf den mittleren arteriellen Blutdruck und die Herzfrequenz beobachtet. Im Vergleich zu nichtvorbehandelten Tieren konnte eine deutliche Potenzierung der blutdruck- und herzfrequenzreduzierenden Guancydinwirkung nachgewiesen werden. Der Effekt war dosisabhängig, da 2 Std nach der Guancydingabe die mit 25 mg/kg Furosemid oder 50 mg/kg Mefrusid vorbehandelten Tiere einen signifikant niedrigeren Blutdruck aufwiesen als diejenigen, die vorher 12,5 mg/kg Furosemid oder 25 mg/kg Mefrusid erhalten hatten (p〈0,01). Es konnte wahrscheinlich gemacht werden, daß die Ursache für diesen Effekt weniger in einer diuretikumbedingten Veränderung des Wasser- und Elektrolythaushalts als darin liegt, daß Furosemid, Mefrusid und Guancydin über dasselbe renale Transportsystem ausgeschieden werden. Als Ausdruck einer Konkurrenz der Substanzen um dieses Transportsystem kam es möglicherweise zu einer Verzögerung der Guancydinausscheidung und somit zu einer verstärkten Wirkung des Antihypertensivums auf den Blutdruck und die Herzfrequenz. Diese Auslegung der Ergebnisse wird außerdem dadurch bestätigt, daß in weiteren Versuchen der diuretische und natriuretische Furosemideffekt durch Vorbehandlung mit Guancydin signifikant herabgesetzt werden konnte (p〈0,01). Dieser Effekt war gleichfalls dosisabhängig.
    Notes: Summary In rats, which were treated, with furosemide and mefruside, the effect of intraperitoneally injected guancydine (25 mg/kg) on the mean arterial blood pressure and the heart rate was studied over a period of 2 hrs. In comparison with, normal animals, a significant potentiation of the depressant effect of guancydine on heart rate and blood pressure was observed. This effect was dose dependent, since the animals, which were pretreated with 25 mg/kg furosemide or 50 mg/kg mefruside, showed a significantly lower blood pressure than rats, which received 12,5 mg/kg furosemide or 25 mg/kg mefruside (p〈0.01). It is suggested, that the causes of these effects were not the saluretic-induced alterations of the water and electrolyte balance but the fact, that furosemide, mefruside and guancydine are excreted by the same renal transport system. These findings were strongly supported by the fact, that in other experiments pretreatment with guancydine significantly lowered the diuretic and natriuretic action of furosemide (p〈0.01). This effect was also dose dependent.
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 59 (1981), S. 59-67 
    ISSN: 1432-1440
    Keywords: Captopril-treatment resistant hypertension ; Essential hypertension ; Renalparenchymatous hypertension ; Renovascular hypertension ; Captopril ; therapieresistente Hypertonie ; Essentielle Hypertonie ; Renalparenchymatöse Hypertonie ; Renovaskuläre Hypertonie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In der vorliegenden Studie wurden 51 Patienten mit schwerer, auf eine standardisierte Dreiertherapie resistente Hypertonie (20 mit essentieller, 15 mit renovaskulärer und 16 mit renalparenchymatöser Hypertonie) mit dem oralen Converting enzyme Inhibitor Captopril behandelt. Die mittlere Behandlungszeit betrug 8,6 Monate für Patienten mit essentieller, 8,9 Monate für solche mit renovaskulärer und 9,9 Monate für Fälle mit renalparenchymatöser Hypertonie. In allen 3 Patientengruppen konnte ein ausgeprägter und anhaltender Blutdruckabfall beobachtet werden. Allerdings war sowohl der absolute Blutdruckabfall als auch die individuelle Blutdruckantwort bei Patienten mit renovaskulärer Hypertonie ausgeprägter als bei solchen mit essentieller und renalparenchymatöser Hypertonie. Diese Ergebnisse weisen damit auf einen stärkeren antihypertensiven Effekt von Captopril bei Patienten mit renovaskulärer Hypertonie hin. Unsere Resultate zeigen weiter, daß eine Monotherapie mit Captopril eher die Ausnahme als die Regel war. So benötigten über 90% der Patienten zusätzliche Gabe eines Diuretikums und ein weiterer Anteil der Patienten darüberhinaus die Gabe eines Betablockers (50% der Patienten mit essentieller, 38% der Fälle mit renalparenchymatöser und 26% der Patienten mit renovaskulärer Hypertonie). Die Plasma-Renin-Aktivität stieg unter Captoprilbehandlung erwartungsgemäß an, während die Plasma-Aldosteron-Konzentration und die Converting enzyme Aktivität abfielen. In 17,6% (n=9) der 51 Patienten konnten Nebenwirkungen (Exanthem, Pruritus, supraventrikuläre Extrasystolen, Tachykardie, Wasser- und Flüssigkeitsretention, Raynaud-Phänomen, unvollständiger und vollständiger Geschmacksverlust und Leukopenie) beobachtet werden. Unsere Ergebnisse zeigen, daß Captopril bei schwerer therapieresistenter Hypertonie ein potentes Antihypertensivum ist. Dabei war bei unseren Patienten eine Monotherapie mit Captopril eher die Ausnahme als die Regel. So benötigten die meisten Patienten zusätzlich ein Diuretikum und/oder einen Betablocker. Allerdings erfordern die Nebenwirkungen des Medikaments eine engmaschige und genaue Überwachung aller Patienten.
    Notes: Summary In this study 51 patients with severe hypertension (20 essential, 15 renovascular and 16 renalparenchymatous) resistant to a standardized triple therapy were treated with the oral converting enzyme inhibitor captopril. Mean treatment period was 8.6 in essential, 8.9 in renovascular and 9.9 months in renalparenchymatous hypertension. In each of the 3 groups a marked and sustained blood pressure reduction was observed promptly after introducing captopril. However, absolute fall in mean blood pressure as well as individual blood pressure response were more pronounced in renovascular than in essential and in renalparenchymatous hypertension demonstrating a higher blood pressure lowering activity of the converting enzyme inhibitor in the former. In addition, our results document that monotherapy with captopril was rather the exception than the rule. More than 90% of all patients required at least the addition of a diuretic and even a substantial percentage of patients needed as a third drug a betablocker (50% in essential, 38% in renalparenchymatous and 26% in renovascular hypertension). As expected renin activity increased under captopril whereas plasma aldosterone and converting enzyme activity decreased. Side-effects (skin rash, pruritus, supraventricular extrasystoles, tachycardia, water and fluid retention, Raynaud-phenomenon, incomplete and complete taste loss and leucopenia) occurred in 17.6% (n=9) of the 51 patients. Our results show that captopril is a potent blood pressure lowering agent in severe and therapy resistant hypertension. The vast majority of patients, however, required concomitant therapy with a diuretic and/or a betablocker. Finally, the frequency of drug induced side-effects necessitates a close and careful monitoring of all patients.
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