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Coronary stent immobilization during angioplasty by transcoronary ventricular pacing via a guidewire
Garikoitz Lasa1, Mariano Larman, Koldo Gaviria
1Servicio de Hemodinámica y Cardiología Intervencionista, Policlínica Gipuzkoa, 20009 San Sebastián, Guipúzcoa, Spain. glasa@med.policlinicagipuzkoa.com
Insights
Rapid ventricular pacing via an angioplasty guidewire effectively immobilizes coronary stents by reducing pulsatile motion. This safe and effective technique improves stent positioning in patients with excessive movement during angioplasty.
Area of Science:
- Cardiovascular Interventions
- Interventional Cardiology
- Medical Device Technology
Background:
- Cardiac contractions can cause coronary artery motion, complicating precise stent placement.
- Existing methods for stent immobilization include inducing asystole or tachycardia.
- Excessive pulsatile motion poses a challenge for accurate stent implantation.
Purpose of the Study:
- To evaluate the efficacy and safety of rapid ventricular pacing via an angioplasty guidewire for stent immobilization.
- To assess the reduction in pulsatile motion during transcoronary ventricular pacing.
- To determine the effectiveness of this technique in challenging stent implantation cases.
Main Methods:
- The study included 27 consecutive patients with excessive stent movement during angioplasty.
- Transcoronary ventricular pacing was induced via an angioplasty guidewire to reduce pulsatile motion.
- Pacing rates of 100 and 150 beats per minute were utilized.
Main Results:
- Median stent displacement decreased from 4.08 mm at baseline to 1.39 mm (100 bpm) and 0.54 mm (150 bpm).
- Transcoronary myocardial pacing demonstrated 96% effectiveness in reducing motion.
- No pacing-related complications were reported during the study.
Conclusions:
- Transcoronary ventricular pacing via an angioplasty guidewire is a safe and effective method for stent immobilization.
- This technique successfully addresses excessive pulsatile motion, improving stent positioning.
- The method offers a valuable solution for challenging stent implantation scenarios.
Introduction And Objectives:
In some patients, cardiac contractions cause the coronary artery segment adjacent to a stent to move in such a way that accurate stent positioning is difficult. A number of techniques have been described for immobilizing the stent at the target site by inducing periods of either asystole or tachycardia. This study shows how pulsatile motion can be controlled by means of rapid ventricular pacing via an angioplasty guidewire.
Methods:
The study involved 27 consecutive patients in whom excessive stent movement during angioplasty complicated accurate stent implantation. In these selected patients, myocardial tachycardia was induced by transcoronary ventricular pacing via an angioplasty guidewire with the aim of reducing the pulsatile motion of the stent.
Results:
At baseline, the median displacement was 4.08 mm (interquartile range 2.75 mm). During pacing at 100 and 150 beats per minute, the median displacement was 1.39 mm and 0.54 mm, respectively (interquartile range 1.66 mm and 0.54 mm, respectively). Transcoronary myocardial pacing was effective in 96% of cases. No complications associated with pacing were reported.
Conclusions:
Transcoronary ventricular pacing via an angioplasty guidewire was an effective and safe method for achieving stent immobilization in cases where there was excessive pulsatile motion.
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