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November 7, 2000CirculationOpen Access

New Mechanism of Antiarrhythmic Drug Action

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Key result

The cardiac-specific L-type calcium current enhancer Bay Y5959 prevented the initiation of sustained ventricular tachycardia in 7 of 14 (50%) canine infarct experiments.

Why the study?

Does enhancing L-type calcium current with Bay Y5959 prevent initiation of sustained ventricular tachycardia in healing canine infarcts?

Population

Healing canine infarcts with reentrant circuits in the epicardial border zone during sustained ventricular…

Design

Preclinical

Authors

CCCándido CaboCity University of New YorkHSHeiko SchmittUniversity of ConnecticutAWAndrew L. WitElectrophysiology

Discussion

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Implication

No immediate clinical implications; leaves open translation of L-type calcium enhancement to human postinfarct VT prevention.

Structured PICO

Does enhancing L-type calcium current with Bay Y5959 prevent initiation of sustained ventricular tachycardia in healing canine infarcts?

P
Population
Healing canine infarcts with reentrant circuits in the epicardial border zone (EBZ) during sustained ventricular tachycardia, n=14 experiments
I
Intervention
Bay Y5959 (cardiac-specific L-type calcium current enhancer)
O
Outcome
Initiation of sustained ventricular tachycardiasurrogate

Enhancing L-type calcium current with Bay Y5959 prevents sustained ventricular tachycardia initiation in a canine infarct model by altering conduction properties.

Cite This Study

Cabo et al. (2000) studied Ventricular tachycardia in healing canine infarcts (n=14). Bay Y5959 was evaluated on Prevention of initiation of sustained ventricular tachycardia. The cardiac-specific L-type calcium current enhancer Bay Y5959 prevented the initiation of sustained ventricular tachycardia in 7 of 14 (50%) canine infarct experiments.

synapsesocial.com/papers/6a0f7a292badbc352afe39c3https://doi.org/10.1161/01.cir.102.19.2417
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Effects of Bay Y5959 on Ca2+ Currents and Intracellular Ca2+ in Cells That Have Survived in the Epicardial Border of the Infarcted Canine Heart1999 · 13 citations
  2. 2Dynamic Ca<sup>2+</sup>-Induced Inward Rectification of K<sup>+</sup>Current During the Ventricular Action Potential1998 · 68 citations
  3. 3Electrophysiological Effects of Flecainide on Anisotropic Conduction and Reentry in Infarcted Canine Hearts1995 · 89 citations
  4. 4Mechanisms for Absence of Inverse Relationship Between Coupling Intervals of Premature Impulses Initiating Reentrant Ventricular Tachycardia and Intervals Between Premature and First Tachycardia Impulses1997 · 8 citations
  5. 5Calcium-sensitive delayed rectifier potassium current in guinea pig ventricular cells1990 · 149 citations