Noninvasive electrocardiogram imaging of substrate and intramural ventricular tachycardia in infarcted hearts

Noninvasive electrocardiogram imaging of substrate and intramural ventricular tachycardia in infarcted hearts.

OBJECTIVES The goal of this study was to experimentally evaluate a novel noninvasive electrocardiographic imaging modality during intramural reentrant ventricular tachycardia (VT). BACKGROUND Myocardial infarction and subsequent remodeling produce abnormal electrophysiologic substrates capable of initiating and maintaining reentrant arrhythmias. Existing noninvasive electrocardiographic metho...

Susceptibility of infarcted canine hearts to digitalis-toxic ventricular tachycardia.

The susceptibility to the toxic arrhythmogenic effects of digitalis was studied in to normal dogs (group 1) and in 15 dogs with healed myocardial infarction (group 2) 26 ± 5 days after coronary artery ligation. The dose of ouabain required to cause stable digitalis-toxic ventricular tachycardia was 25% less in the group 2 dogs than in the group 1 control dogs (70 ± 21 versus 93 ± 16 J.tg/kg, pr...

Diagnosis of Ventricular Tachycardia Electrocardiography

Les signes clectrocardiographiques classiques nc sont pas toujours suMisants pour ·le diagnostic de la tachycardie ventriculaire. Nous avons insiste d'une part sur !'importance diagnostique des complex de ca· ptures et d'auters part sur l'import.anre des procedcs nouveux Tels :  1- Enrcgishemcnt du potentiel du faisreau de  2- Stimulation references endocavitaire.

Noninvasive ECG imaging of electrophysiologically abnormal substrates in infarcted hearts : A model study.

BACKGROUND Myocardial infarction and subsequent remodeling create substrates with altered electrophysiological (EP) properties that are highly arrhythmogenic. Existing ECG methods cannot always detect the existence of such substrates nor provide any detailed information about their EP characteristics. A noninvasive method with such capabilities is greatly needed for identifying patients at risk...

Intramural outflow tract ventricular tachycardia: anatomy, mapping, and ablation.