Female broilers were evaluated at 4, 5, and 6 wk of age (1.2, 1.8, and 2.3 kg BW, respectively) to assess changes in cardiac output and related hemodynamics associated with BW gain, and to evaluate cardiopulmonary hemodynamic adjustments occurring secondary to i.v. injections of epinephrine (0.1 mg/ kg BW). Cardiac output increased with BW (253, 348, and 434 mL/min at 4, 5, and 6 wk, respective...

Cardiac output and arterial pressure in the conscious state were measured in spontaneously hypertensive rats and normal control rats with chronically implanted electromagnetic flow probe and arterial indwelling cannula. Cardiac index at rest was greater in hypertensive rats than in controls. However, the mean arterial pressure in probe implanted hypertensive rats was significantly lower than th...

A modification of the conventional Flipped Voltage Follower (FVF) to enhance its output resistance is presented. It consists of replacing the conventional cascoding transistor of the basic cell by a regulated cascode scheme. This decreases the output resistance by a factor gmro approximately, the gain of a transistor as an amplifying stage. This is achieved with only two additional transistors ...

Recent technological developments have created new devices that could improve and simplify the construction of stimulus isolators. HEXFET transistors can switch large currents and hundreds of volts in nanoseconds. The newer opto-isolators can give a pulse rise time of a few nanoseconds, with output compatible with MOSFET devices, in which delays are reduced to nanoseconds. Integrated DC/DC conv...

FERRARIO, CARLOS MARIA. Contribution of cardiac output and I periphral resistance to experimental renal hypertension. Am. J. Physiol. 226(3): 71 l-71 7. 1974.-An early increase in cardiac output accompanies development of hypertension due to cellophane perinephritis. The question arose whether a similar hemodynamic response follows rise in blood pressure after constriction of a renal artery. El...

Human body communication (HBC) utilizes human body as part of the transmission channel. The present paper deals with HBC between a transmitter worn on the user’s wrist and an off-body stationary receiver touched by the user’s finger. In this configuration, transmitter-human-body system can be regarded as a signal source as viewed from the receiver. The equivalent output impedance of this signal...

It has been suggested, but not established, that renal hypertension is initiated by increase in cardiac output. Recent refinements in electromagnetic flowmeter technology allowed a critical reevaluation of this possibility. Flowmeters were implanted around dogs' ascending aortas and arterial cadieters inserted; measurements were made daily before and after production of hypertension by the cell...