Discrimination between QRS and T Waves Using a Right Parasternal Lead for S‐ICD in a Patient with a Single Ventricle

Abstract

The subcutaneous implantable cardioverter-defibrillator (S-ICD) is a useful option for patients with a single ventricle (SV) in which transvenous leads are contraindicated because of intracardiac shunts. We report a case in which a right parasternal lead placement was indicated for an S-ICD in a resuscitated patient with an SV. There were significant changes in the magnitude of R to T waves ratio in the right compared to the left parasternal lead position. Screening in the right parasternal position is effective for selecting appropriate patients with congenital heart disease for S-ICD implantations.

Vapor phase deoxygenation of heptanoic acid over silica-supported palladium and palladium-tin catalysts

“…Previous work has shown that Sn can be a beneficial additive to metal catalysts for a range of chemical reactions. [14][15][16][17][18][19][20] Electronic effects have been observed in metal-Sn alloys resulting in a decreased heat of adsorption for CO. 21 These reported electronic effects may help decrease the rate of deactivation due to self-poisoning. 22 Furthermore, Chiappero et al have demonstrated that Pt alloyed with Sn can improve the selectivity to alpha olefins formed during the deoxygenation of methyl esters under semi-batch conditions at temperatures ranging from 593 K to 623 K and pressures ranging from 0.2 MPa to 1.14 MPa.…”

Electrocardiographic history of pulmonary arterial hypertension – from diagnosis, through pregnancy, to lung transplantation

“…There were no significant atrial or ventricular arrhythmia during the observation. ECG changes are not specific for PAH, however, several studies show a predictive value of ECG in adult PAH patients [6,7,8,9,10,11,12]. Igata et al [6] demonstrate that the amplitude of RV1+SV5/6 inversely correlates with mean pulmonary artery pressure (mPAP) and right ventricular ejection fraction and patients with an amplitude greater than 16.4 mm had a worse prognosis during follow-up.…”

“…Igata et al [6] demonstrate that the amplitude of RV1+SV5/6 inversely correlates with mean pulmonary artery pressure (mPAP) and right ventricular ejection fraction and patients with an amplitude greater than 16.4 mm had a worse prognosis during follow-up. The study on chronic thromboembolic pulmonary hypertension patients revealed that the S waves in V5, R waves in V1 + S waves in V5, S waves in I, and the QRS axis were predictors of mPAP ≥ 30 mm Hg [7]. Change in mPAP was associated with a change in the amplitudes in the ECG after balloon pulmonary angioplasty (BPA) and improvement in an R in V1 + S in V5 predicts a lower functional class in a 6-month follow-up.…”