Imran Niazi
University of Wisconsin-Madison
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Publication
Featured researches published by Imran Niazi.
Pacing and Clinical Electrophysiology | 2014
Imran Niazi; Anwer Dhala; Indrajit Choudhuri; Jasbir Sra; Masood Akhtar; Abdul Jamil Tajik
Cardiac resynchronization therapy (CRT) has proven salutary effects in patients with congestive heart failure, systolic dysfunction, and electromechanical dyssynchrony in the setting of ischemic, nonischemic, and congenital cardiomyopathy. While CRT device implants have become routine in the adult ischemic or nonischemic cardiomyopathy populations, patients with congenital heart disease offer special challenges due to unusual anatomic variations.
Pacing and Clinical Electrophysiology | 2015
Imran Niazi; Johannes Sperzel; Edwin Kevin Heist; Stuart Rosenberg; Kyungmoo Ryu; Michael Yang; Andre d'Avila; Jagmeet P. Singh
Electroanatomic mapping systems track the position of electrodes in the heart. We assessed the feasibility of characterizing left ventricular (LV) performance during cardiac resynchronization therapy (CRT) implant utilizing an electroanatomic mapping system to track the motion of CRT lead electrodes, thus deriving ventricular contractility surrogates.
Pacing and Clinical Electrophysiology | 2014
Indrajit Choudhuri; Dean MacCarter; Rachael Shaw; Steve Anderson; John A. St. Cyr; Imran Niazi
One‐third of eligible patients fail to respond to cardiac resynchronization therapy (CRT). Current methods to “optimize” the atrio‐ventricular (A‐V) interval are performed at rest, which may limit its efficacy during daily activities. We hypothesized that low‐intensity cardiopulmonary exercise testing (CPX) could identify the most favorable physiologic combination of specific gas exchange parameters reflecting pulmonary blood flow or cardiac output, stroke volume, and left atrial pressure to guide determination of the optimal A‐V interval.
Pacing and Clinical Electrophysiology | 2013
Imran Niazi; Neil Rennick; Jo Ann Kiemen; Jasbir Sra
Arrhythmogenic right ventricular dysplasia (ARVD) predominantly involves the right ventricle, and myocardium is progressively replaced by fat and fibrous tissue in the apex, base, and outflow tract regions. This pathology, and the progressive nature of the disease, poses special challenges for implant and subsequent appropriate functioning of an implantable cardioverter‐defibrillator. This case report describes a solution to problems during lead placement in patients with ARVD.
Heart Rhythm | 2012
Atul Bhatia; Imran Niazi; Mohamed S Rahman; Jasbir Sra
w b p t l c t s t Unfavorable coronary sinus (CS) anatomy remains an impediment to placing the left ventricular (LV) lead for cardiac resynchronization. We successfully implanted a biventricular defibrillator in a patient with unique anomalous coronary venous drainage, not described to date. A 51-year-old man with dilated nonischemic cardiomyopathy, left bundle branch block (QRS duration 160 ms), LV dysfunction (ejection fraction 20%), and chronic systolic heart failure (NYHA Class III) underwent biventricular defibrillator implantation. After transvenous CS cannulation, angiography performed in the 30° left anterior oblique (LAO) view suggested atresia of CS in the posteroinferior portion of the right atrium (RA) with a large anomalous venous connection filling retrogradely and draining into the RA roof just posterior to and leftward of the superior vena cava/RA junction (Figure 1A). Selective cannulation of this anomalous ostium in the RA roof was achieved with a 6F steerable decapolar catheter (Biosense Webster Inc., Diamond Bar, CA, USA). Angiography (28° LAO projection) performed through the guiding sheath at this site revealed a venous tributary draining the posterolateral LV wall. An LV lead (Medtronic Inc., Minneapolis, MN, USA) was successfully placed in the targeted posterolateral venous branch (Figure 1B, arrows) with good pacing parameters and withut any evidence of phrenic nerve stimulation. The course f the lead is shown on chest X-ray film (Figure 1C, arows). Axial slice from three-dimensional (3D) spiral comuted tomography (Figure 1D) showed the course of the LV
Journal of Interventional Cardiac Electrophysiology | 2014
Imran Niazi; Kyungmoo Ryu; Richard Hood; Indrajit Choudhuri; Masood Akhtar
Europace | 2016
Imran Niazi; Christopher Hayes; Rebecca Dahme
Circulation | 2013
Mahek Mirza; Beeletsega Yeneneh; Chi Cho; Indrajit Choudhuri; M. Eyman Mortada; Vikram Nangia; Atul Bhatia; Imran Niazi; Jasbir Sra; Arshad Jahangir
Journal of Cardiac Failure | 2012
Imran Niazi; Kyungmoo Ryu; Rebecca Dahme; Indrajit Choudhuri; Arshad Jahangir; Masood Akhtar; Jasbir Sra
Journal of Cardiac Failure | 2012
Imran Niazi; Gery Tomassoni; James H. Baker; Raffaele Corbisiero; Charles Love; David Martin; Robert Sheppard; Seth J. Worley; Nicole Harbert