ABSTRACT
BACKGROUND: Temporary pacing is usually performed by cardiologists under fluoroscopic, echocardiographic, or ECG guidance. However, in the developing world, there are inadequate number of cardiologists, and C-arm, catheterization laboratories, or echocardiography are not available at primary or secondary healthcare facilities. In addition, in emergencies option of fluoroscopy and echocardiography is limited. So these patients are transferred to a facility where cardiologists and these facilities are available. Crucial time is lost in transit, which leads to increased mortality. In this study, we aimed to evaluate the safety, efficacy, and practicability of unguided temporary pacemaker insertion. RESULTS: A total of 1093 patients were enrolled in this study. After cannulating the internal jugular vein or subclavian vein, the pacing lead attached to the pulse generator was advanced blindly till ventricular pacing was achieved. Procedural success was taken as the primary endpoint. Secondary endpoints included the number of attempts taken for successful central venous puncture and procedural time. Complications and mortality were assessed for safety outcomes. Finally, the position of the pacing lead was assessed after the procedure on X-ray or fluoroscopy. The procedure was successful in all but one patient in whom a femoral vein approach was required because of brachiocephalic vein obstruction. Right internal jugular access was achieved in 981 (89.75%) patients. The mean number of attempts taken for achieving successful venous accesses was 1.54 ± 0.85; however, in 726 (66.42%) patients it was achieved in the first attempt. The mean procedural time was 11.5 ± 2.1 min. Overall, 117 (10.70%) patients developed complications; however, most of them were minor. Pneumothorax developed in 12 (1.1%) patients, of whom 2 needed an intercostal tube. Pericardial effusion was seen in 21 (1.92%) patients. Pacing lead tip was located in the right ventricular cavity abutting interventricular septum or free wall in 843 (77.20%) patients. No mortality attributable to procedure occurred. CONCLUSIONS: Unguided temporary pacing via jugular or subclavian venous approach in an emergency setting is possible with high success and a low complication rate. Thus, it is a safe and effective procedure, and clinicians working at primary and secondary healthcare levels should be encouraged to perform this procedure. Trial registration UMIN Clinical Trials Registry, UMIN000046771. Registered 28 January 2022-Retrospectively registered, https://center6.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000053348.
