| 摘要 |
<p>An intravenous lead assembly for atrioventricular (AV) sequential pacing includes a channel (3) and a separable core (1) lead. The channel lead (3) and the core lead (1) respectively include first and second helical coil conductors (9, 25) which are embedded in first and second elongated silicone rubber sleeves, respectively. The silicone rubber sleeve of the channel lead (13) includes an elongated channel (17). In use, the core lead (1) is passed through the channel (17) of the channel lead (3) either before or after the channel lead is passed through selected veins into a patient's heart. Handles (11, 19) are provided on the proximal ends of the stylets (7, 21) to enable a physician to manipulate the distal ends of the channel lead (3) and core lead (1). In one embodiment of the invention, the channel terminates in a side port (29) of the channel lead, enabling the physician to guide the tip (33) of the core lead (1) out of the side port (29) and into the right ventricle after the distal end of the channel lead (3) has been positioned in the coronary sinus or the right atrial appendage.</p> |
