Search results for "hemodynamic"
showing 10 items of 526 documents
Effects on Arterial Blood Pressure of Methanol and Dichloromethanol Extracts fromJuniperus oxycedrus L.
1997
The present study analysed the effect of the methanol and dichloromethanol extracts from Juniperus oxycedrus on arterial blood pressure in anaesthetized rats. The arterial blood pressure of normotensive rats was significantly reduced by the i.v. administration of both extracts. The hypotensive effect of these extracts was independent of the adrenergic system. These results may explain the vasorelaxing actions observed in other Juniperus species.
Effects on Arterial Blood Pressure of the Methanol and Dichloromethanol Extracts from Schinus molle L. in Rats
1996
The effects on arterial blood pressure of the methanol and dichloromethanol extracts from Schinus molle L. were analysed in urethane anaesthetized rats. In normotensive rats, the mean arterial blood pressure was significantly reduced by the i.v. administration of both extracts. The dichloromethanol extract inhibited the effects of noradrenaline on arterial blood pressure in the anaesthetized rat and it reduced the maximal contractile effect (Emax) induced by noradrenaline on rat vas deferens in the organ bath. However, the methanol extract did not modify the effects of noradrenaline in the evaluated tests.
Cardiovascular effects of the methanol and dichloromethanol extracts fromTeucrium cartaginenses L.
1998
Methanol and dichloromethanol extracts of the leaves and stems of Teucrium cartaginensesL. have been tested for their effects on resting arterial blood pressure, heart rate and noradrenaline induced hypertension. Both extracts administered i.v. to urethane anaesthetized normotensive rats reduced mean arterial blood pressure and heart valve, while only the dichloromethanol extract prevented noradrenaline induced hypertension. © 1998 John Wiley & Sons, Ltd.
Long-term treatment with the ace inhibitor captopril, alone or in combination with hydrochlorothiazide, in elderly hypertensives: Effects on blood pr…
1993
Abstract The efficacy and tolerability of long-term treatment with the angiotensin converting enzyme inhibitor captopril was evaluated in elderly hypertensive subjects. One hundred thirty patients were studied (61 men and 69 women; mean age, 68.33 ± 5.49 years), all with mild to moderate arterial hypertension (mild = 90–105 mmHg; moderate = 105–115 mmHg). Patients with secondary hypertension were excluded from the study. After a 2-week drug washout, patients were given captopril 25 to 100 mg/day alone or in combination with hydrochlorothiazide (HCTZ) 25 mg/day for 15 weeks. After 2 weeks of treatment, significant decreases in systolic and diastolic blood pressures were observed (P
Zur Frage der Beziehungen zwischen enddiastolischem Ventrikeldruck unddp/dt bzw.d 2 p/dt 2 der Ventrikeldruckkurve des Herzens
1969
Correlations between left ventricular enddiastolic pressure of the heart and first and second derivation of left ventricular pressure curve (dp/dt, d2p/dt2 respectively) were examined at various hemodynamic conditions. The results showed only a particular dependence ofdp/dt andd2p/dt2 from enddiastolic pressure. Therefore, it is concluded, that enddiastolic pressure is not the most important factor, which influences the dynamics of ventricular contraction.
Cardiovascular effects of the methanol and dichloromethanol extracts fromMentha suaveolensEhrh.
2001
Methanol and dichloromethanol extracts of the leaves and stems of Mentha suaveolens Ehrh. have been tested for their effects on resting arterial blood pressure, heart rate and noradrenaline induced hypertension. Both extracts administered by i.v. bolus to urethane anaesthetized normotensive rats reduced the mean arterial blood pressure and heart rate, while only the dichloromethanol extract prevented the noradrenaline induced hypertension.
Heart rate and blood pressure responses to a competitive role-playing game
2001
The effects of the outcome of competitive encounters on physiological parameters have been studied, especially testosterone levels, but hardly on other systems that, however, present a high sensitivity to stress. This study assessed the effect of a competitive game on heart rate (HR) and blood pressure (BP) in a sample of university students. In addition, the influence of anxiety and attributions of the outcome was also explored. Only winners significantly showed a rise in HR during the competition followed by a decrease along the posttask phase in addition to more internal attributions. On the contrary, the average HR for losers during the competition was lower compared with their baseline…
Bidirectional Glenn and antegrade pulmonary blood flow: temporary or definitive palliation?
2008
Background We sought to investigate the role of the bidirectional Glenn with antegrade pulmonary blood flow in the surgical history of children with univentricular hearts. Methods A series of 246 patients, from three joint institutions, having univentricular heart with restricted but not critical pulmonary blood flow received a bidirectional cavopulmonary shunt with additional forward pulmonary blood flow. All patients have been studied according to their progression, or not, to Fontan operation. Two hundred and eight (84.5%) patients underwent bidirectional cavopulmonary anastomosis as primary palliation. Twenty patients (8.1%) with previous pulmonary artery banding were also enrolled in t…
Inhaled iloprost to control residual pulmonary hypertension following pulmonary endarterectomy.
2005
Objective: Pulmonary endarterectomy (PEA) is the standard therapy for patients with chronic thromboembolic pulmonary hypertension (CTEPH). In the immediate postoperative period, persistent pulmonary hypertension increases the risk of acute respiratory or right heart failure. In pulmonary arterial hypertension, prostanoid inhalation has been found to improve pulmonary hemodynamics, right ventricular function, gas exchange, and clinical outcome. We report the results of a double-blinded randomized trial with the aerosolized prostacyclin analogue iloprost in patients with residual pulmonary hypertension after PEA. Methods: Twenty-two patients (age, 55 � 13 years; 8 females; propofol- and sufen…
Inhaled iloprost in patients with chronic thromboembolic pulmonary hypertension: effects before and after pulmonary thromboendarterectomy.
2003
Abstract Background In primary pulmonary hypertension, aerosolized prostanoids selectively reduce pulmonary vascular resistance and improve right ventricular function. In this study, hemodynamic effects of inhaled iloprost, a stable prostacyclin analogue, were evaluated in patients with chronic thromboembolic pulmonary hypertension (CTEPH) before and early after pulmonary thromboendarterctomy (PTE). Methods Ten patients (mean age 49 years old [32 to 70 years old], New York Heart Association functional class III and IV) received a dose of 33 μg aerosolized iloprost immediately before surgery (T1), after intensive care unit admission (T2), and 12-hours postoperatively (T3). Effects on pulmona…