Multifunctional cardiac pacemaker system

A method of stimulating a mammalian heart via a single pacing/sensing cardiac pacemaker system comprising:

• providing a pacemaker system comprising a pacemaker device first and second cardiac leads and a guide catheter wherein said pacemaker device comprises a pulse generator for producing cardiac stimulating pulses, wherein said first cardiac lead is connected to said pulse generator and comprises first and second electrodes, wherein said second cardiac lead is connected to said pulse generator and comprises a third electrode, and wherein said guide catheter comprises a flexible hollow tubular body dimensioned to house said first and second cardiac leads and a stylet;
• inserting said guide catheter into a right cardiac ventricle via the subclavian vein;
• inserting said first cardiac lead through said guide catheter into the right cardiac ventricle and actively fixing said first electrode to the apex of the right cardiac ventricle with first fixation means;
• inserting said stylet into the first cardiac lead and attaching said stylet to the second electrode;
• pushing said second electrode with the stylet through the apex of the right cardiac ventricle and position it at the apex of the left cardiac ventricle;
• activating the second electrode's active fixation mechanism with the stylet and fixing said second electrode to the apex of the left cardiac ventricle with second fixation means;
• inserting said second cardiac lead through the guide catheter into the right cardiac atrium;
• initiating stimulation of the right cardiac ventricle, left cardiac ventricle and right cardiac atrium via said first second and third electrodes, respectively, wherein said stimulation comprises at least one of pacing, sensing or defibrillation.