PMID: 4031299Oct 1, 1985Paper

Effects of a new nonionic and a conventional ionic contrast agent on coronary sinus ionized calcium and left ventricular hemodynamics in dogs

Journal of the American College of Cardiology
P D BourdillonW Grossman

Abstract

Transient myocardial depression associated with intracoronary injections of contrast medium has been attributed to hypertonicity and to calcium binding. To further assess the importance of calcium binding, a new technique for continuous monitoring of coronary sinus ionized calcium with an intravascular calcium-selective electrode was used. With this calcium-selective electrode the effects of intracoronary injection in dogs of a conventional ionic contrast agent, sodium meglumine diatrizoate (Renografin-76), and a new nonionic agent, iohexol, were assessed and compared. Left ventricular pressure was measured with a micromanometer catheter. After bolus injection of 0.2 ml/kg body weight of Renografin-76 (n = 10), coronary sinus pCa increased by 0.27 from 2.98 +/- 0.02 to 3.25 +/- 0.03, indicating a decrease in ionized calcium from 2.0 to 1.1 mEq/liter. With iohexol (n = 9), pCa increased by only 0.05 +/- 0.01 (p less than 0.001), indicating a decrease in ionized calcium from 2.0 to 1.8 mEq/liter. Peak changes occurred approximately 6 seconds after injection. Renografin-76 caused a marked decrease in left ventricular systolic pressure (140 +/- 7 to 106 +/- 8 mm Hg) and in heart rate (122 +/- 7 to 101 +/- 5 beats/min) with an incre...Continue Reading

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Citations

Apr 1, 1991·Catheterization and Cardiovascular Diagnosis·W H Matthai, J W Hirshfeld
Jan 1, 1986·Cardiovascular and Interventional Radiology·M A Bettmann
Dec 1, 1988·The American Journal of Cardiology·R B RothschildL W Stevenson
Apr 1, 1987·Journal of the American College of Cardiology·R M LangS B Feinstein
Feb 23, 1992·The New England Journal of Medicine·J W Hirshfeld
May 1, 1994·European Journal of Radiology·G Rosati
Jul 1, 1987·The American Journal of Cardiology·R M LangS B Feinstein
Jan 1, 1988·International Journal of Cardiac Imaging·N H PijlsT Van der Werf

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