objective(s) in the present study, the effects of aqueous-ethanolic extract from rosa damascena on heart rate and contractility were examined. materials and methods isolated guinea-pig hearts were perfused through aorta in a langendorff mode. heart rate (hr) and contractility were determined in the presence of four concentrations of the extract (0.1, 0.2, 0.4 and 1.0 mg %) and isoprenaline (1, ...

Objective(s) In the present study, the effects of aqueous-ethanolic extract from Rosa damascena on heart rate and contractility were examined. Materials and Methods Isolated guinea-pig hearts were perfused through aorta in a Langendorff mode. Heart rate (HR) and contractility were determined in the presence of four concentrations of the extract (0.1, 0.2, 0.4 and 1.0 mg %) and isoprenaline (...

objective: several studies have shown that chichorium intybus l. (c. intybus) which possesses flavonoid compounds has an effective role in treatment of cardiovascular diseases. contractile dysfunction mostly occurs after acute myocardial infarction, cardiac bypass surgery, heart transplantation and coronary angioplasty. the aim of the present study was to investigate the effect of aqueous extra...

It is a well-established fact that adenosine and its receptor subtypes (A 1 and A ) are involved in changes of contractility, heart rate and coronary blood flow (CBF) under different circumstances. This study was conducted to evaluate the role of nitric oxide and prostaglandins in development of these changes. For this purpose, Nitro-L-Arginine methyl ester (L-NAME), and indomethacin as inhibit...

it is a well-established fact that adenosine and its receptor subtypes (a 1 and a ) are involved in changes of contractility, heart rate and coronary blood flow (cbf) under different circumstances. this study was conducted to evaluate the role of nitric oxide and prostaglandins in development of these changes. for this purpose, nitro-l-arginine methyl ester (l-name), and indomethacin as inhibit...

Background: Ca is the most important minerals in the body that plays a key rols in the physiological activities, anzymatic reaction and the regulation of myocardial contraction and relax-ation. Ca deficiency causes the heart failure and decrease cardiac contractility. OBJECTIVES: To determine the effects of long-term dietary calcium deficiency on the heart function of layer hens based on the el...

We have reported that the postextrasystolic (PES) potentiation of left ventricular (LV) contractility usually decays in alternans at heart rates above 80-100 beats/min in the canine excised, cross-circulated heart. We examined whether the PES contractility would also decay in alternans even in the canine in situ heart presumably more physiological than the excised heart. In anesthetized, ventil...

background: ca is the most important minerals in the body that plays a key rols in the physiological activities, anzymatic reaction and the regulation of myocardial contraction and relax-ation. ca deficiency causes the heart failure and decrease cardiac contractility. objectives: to determine the effects of long-term dietary calcium deficiency on the heart function of layer hens based on the el...

BACKGROUND New sensors for intelligent remote monitoring of the heart should be developed. Recently, a cutaneous force-frequency relation recording system has been validated based on heart sound amplitude and timing variations at increasing heart rates. AIM To assess sensor-based post-exercise contractility, diastolic function and pressure in normal and diseased hearts as a model of a wireles...