Sentence examples for electrical instability of from inspiring English sources

Hyperglycaemia-induced oxygen radicals may scavenge endogenous nitric oxide, thereby increasing electrical instability of the heart and peripheral vascular tone [ 14].

Under these conditions there is an increased sympathetic adrenergic tone and reduced parasympathetic activity [ 3], a combination that causes augmented ventricular workload and oxygen demand, increasing the occurrence of ischemic events, and causes modification of the ionic currents across the cellular membrane, leading to direct electrical instability of myocytes.

Introduction Electrical storm refers to a state of cardiac electrical instability characterized by multiple episodes of ventricular tachycardia or ventricular fibrillation within 24 h despite antiarrhythmic drugs or device-related therapies (defibrillation or anti-tachycardia pacing) and for which overall mortality was 22 82 % in previous series.

Diastolic Ca2+ leak from the sarcoplasmic reticulum is believed to be the major player for the development of DADs, typical markers of electrical instability in CPVT-CMs.

In conclusion, cardiac screening with noninvasive examinations remains a fundamental tool for the identification of a possible pathologic substrate and for the characterization of electrical instability.

Structural and functional cardiovascular abnormalities act as predisposing factors to cardiac arrest, with a sudden onset of electrical instability with ventricular fibrillation, not preceded by previous symptoms [ 3].

The amount of available data on this topic is, however, limited and further studies are needed to identify the complex mechanism of electrical instability in patients with metabolic disorders.

1 9 Genotype-phenotype correlation studies have demonstrated that subjects carrying mutations of the same gene may have different clinical features and disease extent, in terms of right (RV) and left (LV) ventricular dimensional and kinetics as well as of electrical instability.

T-wave alternans, a marker of myocardial vulnerability and electrical instability, increases in dogs with inhalation of residual oil fly ash (Godleski et al. 2000).

Another analysis of the Boston cohort panel showed positive associations of T-wave alternans (a marker of cardiac electrical instability) from the ambulatory ECGs with exposure to 2-hr average indoor BC (when at home), 2-hr ambient BC (when away), and being in traffic (Zanobetti et al. 2009b).

In patients without notable structural and electrical remodeling of myocardium, physiological elevation in sympathetic activity during REM sleep remains subthreshold concerning clinically significant increase of myocardial electrical instability.