We determined the sequence and timing of inward ventricular wall motion by least-square phase analysis of radionuclide cineangiograms in 10 patients with left bundle branch block (LBBB), five patients with right bundle branch block (RBBB) and 11 patients with normal conduction. All LBBB and RBBB patients had normal coronary arteries and no segmental wall motion abnormalities. The left ventricle...

Dear Sir, the recent issue of Nuclear Medicine Review published an interesting study by Gholamrezanezhad et al. regarding rate dependent left bundle branch block and its effect on myocardial perfusion SPECT [1]. They reported four cases with rate dependent LBBB during exercise stress for myocardial perfusion imaging. Myocardial perfusion SPECT imaging showed no evidence of reversible perfusion ...

BACKGROUND Functional tests have limited accuracy for identifying myocardial ischemia in patients with left bundle branch block (LBBB). OBJECTIVE To assess the diagnostic accuracy of dipyridamole-stress myocardial computed tomography perfusion (CTP) by 320-detector CT in patients with LBBB using invasive quantitative coronary angiography (QCA) (stenosis ≥ 70%) as reference; to investigate the...

BACKGROUND Differentiating ischemic (ILVD) from nonischemic left ventricular dysfunction (NILVD) is important prognostically and therapeutically but might be difficult clinically. The differentiating role of electrocardiographic (ECG) features in the presence of left bundle-branch block (LBBB) is debatable on differentiating ILVD from NILVD. OBJECTIVE The present study assessed whether there ...

Right bundle branch block (RBBB) and left (LBBB) are commonly seen in geriatric cases posted for surgeries. LBBB usually results from conduction system degeneration or myocardial pathology. is often associated with hypertension, myocarditis, coronary heart disease, aortic valve cardiomyopathy etc. We report a case of diagnosed preoperatively emergency spinal decompression. After induction anaes...

Painful left bundle branch block (LBBB) is characterized by chest pain in setting of transient LBBB, the absence ischemia. Management has focused on pharmacological suppression sinus rate to prevent or invasive therapy with permanent pacing. To determine feasibility using oral theophylline for treatment painful LBBB. N/A A 71-year-old man presented evaluation exertional left-sided that resolved...

Introduction Right ventricular outflow tract tachycardia is one of the most common ventricular tachycardia (VT) observed in young patients, accounting for 60%–80% of all idiopathic VTs. The QRS morphology of this tachycardia is left bundle branch block (LBBB) type, inferior axis, and wide QRS complex. In contrast, focal VT originating from the right bundle branch (RBB) is a rare idiopathic VT. ...

We present the case of a 72-year-old male who underwent a permanent transvenous DDD pacemaker implantation for symptomatic complete heart block. The postoperative surface electrocardiogram (ECG) revealed a right bundle branch block (RBBB) pacing pattern with transition in lead V3 and left bundle branch block (LBBB) in D1, suggesting a malpositioned ventricular lead in the left heart. Malpositio...

Abstract Funding Acknowledgements Type of funding sources: None. Introduction Various studies have questioned the magnitude benefit cardiac resynchronization therapy (CRT) in patients without left bundle branch block (LBBB). This worse response could be due to suboptimal location electrodes. Purpose We hypothesize that non-LBBB patients, an implant guided by ventricular electroanatomic mapping ...