supply of srph154080-mri conditional pacing system with accessories for delivery of cardiac resynchronization therapy. system should include a current generation mri conditional crt pulse generator, bipolar steroid-eluting atrial and ventricular lead s and a quadripolar left ventricular ( coronary sinus ) lead and accessories ( lead in troducers, sheaths or guiding catheters etc.,). should provide independently progr ammable right and left ventricular pulse outputs and interventricular delay ( with t he choices of right ventricular alone, left ventricular alone or biventricular pacin g as well as the choice of which ventricle is to be paced first with optimization of del ay for pacing of other ventricle ). should have features like negative av hysteresis a nd triggered modes for continuous delivery of crt. should have advanced features for detection and management and prevention of atrial tachycardias and atrial fibri llation as well as detailed data storage of all arrhythmias and therapy as well as tr ends over time. should have features for management of atrial fibrillation including mode switch, ventricular rate management etc., pulse generator should be suitable for use with either an endocardial lv lead or an epimyocardial lead for lv stimulatio n. lv leads should have optimal features for introduction, positioning and fixation an d documented low displacement rates. unit: no.