Catheters; Cardiac defibrillation electrodes; Cardiac electrodes; Catheters for use in embolectomy; Catheters for use in ablation; High frequency electromagnetic therapy apparatus; Intracardiac catheter; Medical and surgical catheters; Medical devices, namely, pulse generators for neurostimulation, cardiac rhythm management, muscle stimulation; Medical guidewires; Medicinal catheters; Surgical apparatus and instruments for medical use; Surgical instruments and apparatus