Related Experiment Videos
Percutaneous transluminal coronary angioplasty in totally occluded arteries
Insights
Percutaneous Transluminal Coronary Angioplasty (PTCA) can successfully treat nonacute total coronary occlusion, especially when the blockage is recent. Success rates for PTCA in total occlusions depend significantly on occlusion duration and guide wire navigation.
Area of Science:
- Interventional Cardiology
- Vascular Medicine
Background:
- Nonacute total coronary occlusion presents a challenge in interventional cardiology.
- Patients with total occlusion often exhibit reversible ischemia, indicating potential for revascularization.
Purpose of the Study:
- To evaluate the efficacy and safety of Percutaneous Transluminal Coronary Angioplasty (PTCA) for nonacute total coronary occlusions.
- To identify factors influencing PTCA success rates in this patient cohort.
Main Methods:
- Retrospective analysis of 28 patients undergoing PTCA for nonacute total coronary occlusion.
- Assessment of initial success rates, procedural complications, and long-term outcomes.
- Correlation of success with occlusion duration and collateral circulation.
Main Results:
- An initial success rate of 66% was achieved for PTCA in total occlusions.
- Success was strongly correlated with occlusion duration: 85% for <=1 month, 70% for 1-6 months, and 0% for >6 months.
- Failure was primarily due to guide wire inaccessibility (80% of failures).
- Emergency Coronary Artery Bypass Graft (CABG) surgery was needed in 2 cases due to guide wire complications.
Conclusions:
- PTCA is a viable option for selected patients with nonacute total coronary occlusion, particularly for shorter durations.
- Advancements in angioplasty hardware have improved the feasibility of treating these complex lesions.
- Careful guide wire manipulation is crucial to minimize procedural risks and maximize success rates.
Abstract:
Out of 321 consecutive cases of Percutaneous Transluminal Coronary Angioplasty (PTCA), 28 (8.7%) patients underwent PTCA for nonacute total occlusion with no visible antegrade flow. All patients had evidence of reversible ischaemia in the territory of totally occluded artery. Overall initial success rate was 66% and was mainly related to the duration of the occlusion (85% for occlusion of 1 month or less, 70% for 1-6 months, and nil for more than 6 months duration). In 21 (75%) cases where collateral circulation to the occluded vessel could be demonstrated before PTCA, was not visible after successful PTCA. Failure was mainly due to inability to cross the lesion with the guide wire (8 out of 10 failures). Emergency Coronary Artery Bypass Graft (CABG) surgery was required in 2 cases where dissection of nontarget vessels occurred during manipulation of the guide wire. Acute reocclusion occurred in 2 cases, both were redilated successfully. There was no death. Although the primary success rate is lower than that associated with conventional stenotic lesions, with improvement in the hardware-balloon catheters and guide wires, coronary angioplasty can be performed successfully in majority of the patients with total coronary occlusion.