Related Experiment Videos
Percutaneous transluminal coronary angioplasty utilizing prolonged balloon inflations: initial results and six-month
R A Staudacher1, K R Hess, S L Harris
1Veterans Administration Hospital Cardiac Catheterization Laboratories, Houston, Texas.
Insights
Prolonged balloon inflation during percutaneous coronary angioplasty (PTCA) can prevent emergency bypass surgery. However, this technique does not improve long-term restenosis rates in elective procedures.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Surgery
Background:
- Prolonged balloon inflation in percutaneous coronary angioplasty (PTCA) has shown promise in preventing emergency coronary bypass surgery for acute occlusions.
- The long-term efficacy of prolonged balloon inflations in reducing restenosis rates remains unproven.
Purpose of the Study:
- To evaluate a novel hemoperfusion system as an alternative to passive autoperfusion catheters during prolonged balloon inflation in PTCA.
- To assess the impact of this hemoperfusion system on procedural success and long-term restenosis rates.
Main Methods:
- A hemoperfusion system was utilized, drawing blood from an arterial sheath and infusing it through standard balloon catheters during inflation.
- PTCA was performed in 71 male patients with a median balloon inflation time of 4.8 minutes and a perfusion rate of 30 ml/min.
Main Results:
- Successful PTCA (≥20% lumen increase) was achieved in 83% of patients, reducing median diameter stenosis from 82% to 30%.
- Emergency coronary bypass surgery was required in only 5% of patients.
- At six-month follow-up in 37 patients, the restenosis rate was 46%.
Conclusions:
- Prolonged balloon inflation angioplasty, supported by hemoperfusion, is effective in managing complicated PTCA cases and reducing the need for emergency bypass.
- This technique does not offer an advantage in improving long-term restenosis rates for elective PTCA procedures.
Abstract:
Coronary angioplasty (PTCA) using prolonged balloon inflation has obviated emergency coronary bypass surgery in some patients with acute occlusions at the time of PTCA. However, the use of prolonged balloon inflations has not been shown to improve long-term restenosis rates. As an alternative to the passive autoperfusion catheter, we evaluated a hemoperfusion system in which blood was obtained from the side arm of an arterial sheath and infused through the central lumen of standard balloon catheters via a modified Medrad IV pump during balloon inflation. PTCA was performed in 71 male patients (median age 57 yr). The median balloon inflation time was 4.8 minutes and the median rate of blood perfusion was 30 ml/min. PTCA was successful (lumen increase by 20 percentage points) in 83% of patients (59/71) with diameter stenosis decreasing from a median 82% to 30%. Emergency coronary bypass was required in four patients (5%). Angiographic data for six-month followup was available on 37 patients. The restenosis rate (loss of 50% of gain) was 46% (17/37). The conclusion is that prolonged balloon inflation angioplasty has a role in complicated PTCA but offers no advantage in improving long-term restenosis rates in elective PTCA.