Raymond R D, Nanian K B
Pacing Clin Electrophysiol. 1984 May;7(3 Pt 1):378-80. doi: 10.1111/j.1540-8159.1984.tb04921.x.
Between October, 1981, and April, 1983, 200 pacemakers were inserted at Rhode Island Hospital. Forty-five bipolar polyurethane leads (Medtronic 6972) were positioned in the right ventricle. Three (6.6%) of these leads presented 15 to 18 months post-implant with insulation failure. The manifestation was inappropriate inhibition of the pacemaker. No obvious cracking was visible on X-ray or during surgery. All the leads had low impedance, indicative of insulation failure.
1981年10月至1983年4月期间，罗德岛医院植入了200个起搏器。45根双极聚氨酯导线（美敦力6972型）被置于右心室。其中3根导线（6.6%）在植入后15至18个月出现绝缘故障。表现为起搏器不适当抑制。X线检查或手术过程中均未发现明显破裂。所有导线阻抗均较低，提示存在绝缘故障。
