Biomedical subjects

L Kraft

Publications and source records attributed to L Kraft.

4 recordsLinked to original sources

PubMed1978

Contrast agents lower ventricular fibrillation threshold.

Ventricular fibrillation thresholds were measured in anesthetized, closed-chest dogs during the injection of Renografin 76 or Conray 400 into the left coronary artery. Both agents significantly lowered fibrillation threshold--Renografin to 58 +/- 7%; Conray to 20 +/- 5% of control, respectively. The experimental method estimates fibrillatory potential of contrast media more precisely than previous methods. The initial results parallel relative toxicities observed in clinical usage.

Animals↗

PubMed1976

[New roentgen diagnosis apparatus for sectional photography of the brain: data processed photos make a timely diagnosis possible].

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Brain Diseases↗

PubMed1976

[New roentgen diagnosis apparatus for sectional photography of the brain: data processing photos of the brain makes early diagnosis possible].

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Brain Diseases↗

PubMedDate not supplied

A proposed mechanism for transient increases in arterial pressure and flow during angiographic injections.

In a series of animal experiments, we have confirmed the observation that arterial pressure and flow increase distal to the injection site during power injections through non-obstructing catheters. Our data suggest that the phenomenon is secondary to the transient production of turbulence. Thus, for a given injection rate, catheters with smaller end holes create more fluid velocity, which increases the Reynolds number and causes augmentation of downstream pressure and flow. The addition of side holes decreases the fluid velocity of the injectate and minimizes the hemodynamic effects. The discussion deals with factors contributing to the generation of local turbulence, the magnitude of pressure and flow changes caused by the injections, and the clinical implications of these artifacts.

Angiography↗