...Seigi Tsuchida; Takashi Suzuki Applying intracellular glass microelectrodes to the smooth muscle obtained from the guinea pig pelvicalyceal border, we have succeeded in recording periodic spontaneous action potentials, the so-called slow waves, which are characteristic of a pacemaker...

...Takashi Morita; Takashi Suzuki An electromyographic study of the responses of the pelvicalyceal border which is the pacemaker region of ureteral peristalsis, and of the renal pelvis and ureter to dobutamine and terbutaline, Β 1 - and Β 2 -adrenergic stimulants, respectively, was performed using...

...Takashi Morita; Marcia A. Wheeler; Robert M. Weiss The effect of elevation of renal pelvic pressure on pacemaker activity was examined in 5 isolated human kidneys. Pressure fluctuations transmitted from renal pelvic contractions first appeared in pressure tracings from the upper renal calyx...

...C. Shugart-Reimnitz; C.E. Constantinou The [Ca ++ ] gradient within the rabbit renal pelvis was compared to its inherent pacemaker frequency. The pelvis was removed from the rabbit, sectioned, and [Ca ++ ] ions assayed using wet ash techniques and atomic absorption spectrophotometry. Contraction...

... frequency of spontaneous pacemaker contractions occur at the proximal pelvis with a mean frequency of 4.97 ± 0.85 contractions/min, a mean [Na + ] of 91.0 ± 33.3 mEq/kg wet weight, a mean [K + ] of 18.9 ± 6.0 mEq/kg wet weight. The frequency of spontaneous activity from the middle pelvis and distal pelvis...

.... The following concept for the generation of ureteral peristalsis in multicalyceal kidneys is developed: several (primary) oscillators exist in the calyces; in the pyeloureteral junction a (secondary) pacemaker exists which has an intrinsic frequency similar to that of the calyceal pacemakers; both processes...

... and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements. Bladder Renal pelvis Contractility Tension Smooth muscle Pacemaker Urol. int. 43: 211-218 (1988) © 1988 S. Kargcr...

.... Pacemaker and electrodes remained in situ for 1 year without any complications. © 1974 S. Karger AG, Basel 1974 Copyright / Drug Dosage / Disclaimer Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means...

... Electromyography Radiopaque contrast media Diuresis Vesicoureteral reflux Pacemaker Urol. int. 29: 401-413 (1974) Effects of Radiopaque Contrast Media on the Dynamic Characteristics of Ureteral Function1 C. E. C onstantinou, J. J. G ranato, jr. and D. E. G ovan Division of Urology, Stanford University...

.... This is characterized by a basic rate and whole number multiples of that rate. The methods for identifying the relationship of peristalsis with the pacemaker and respiratory rate is outlined. 27 1 2010 © 1975 S. Karger AG, Basel 1975 Copyright / Drug Dosage / Disclaimer Copyright: All rights reserved...

...C.E. Constantinou; J.R. Hrynczuk The continuity of ureteral peristaltic conduction along the ureter of the dog is examined using two pairs of extracellular macroelectrodes. At urine flow rates below 3 ml/min, ureteral contractions initiated by the pacemaker are propagated without interruption along...

...C.E. Constantinou; J.R. Hrynczuk The influence of Pentothal anesthesia in blocking the mechanism initiating ureteral peristalsis in the dog is examined. Pressure measurements of pacemaker rhythmicity were made through renal cortical catheterization of the renal pelvis. Simultaneously, ureteral...