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Coronary atherectomy: first 50 patients at the Mayo Clinic
U P Kaufmann1, K N Garratt, R E Vlietstra
1Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN 55905.
Insights
This study shows a new coronary atherectomy device is safe and effective for treating blocked arteries. It successfully opened narrowed vessels in 89% of procedures, offering a promising alternative to surgery.
Area of Science:
- Cardiology
- Interventional Cardiology
- Medical Device Technology
Background:
- Coronary artery stenosis poses a significant risk for cardiovascular events.
- Percutaneous coronary intervention often faces challenges with restenosis.
- Atherectomy offers a method for direct plaque removal.
Purpose of the Study:
- To evaluate the safety and efficacy of a novel coronary atherectomy device.
- To assess the device's performance in treating atheromatous lesions and restenosis.
- To determine the success rate and complication profile of the new atherectomy technique.
Main Methods:
- Prospective evaluation of the first 50 patients undergoing 53 procedures with the novel device.
- Treatment applied to atheromatous lesions (27 patients) and post-percutaneous transluminal coronary angioplasty restenosis (23 patients).
- In-hospital follow-up to assess procedural success and complications.
Main Results:
- Successful outcomes (≥40% stenosis reduction, tissue removal, no Q-wave infarction, no bypass surgery) achieved in 89% (47/53) of procedures.
- Mean stenosis reduced from 87% to 15% post-atherectomy.
- Minor complications included embolization (2), intimal dissection (2), side-branch occlusion (1), and transient thrombosis (1).
Conclusions:
- The novel coronary atherectomy device demonstrates a high success rate in treating coronary artery stenosis.
- The procedure is relatively safe and efficient, with a low rate of major complications.
- This device represents a promising therapeutic option for patients with coronary artery disease.
Abstract:
The safety and efficacy of a novel coronary atherectomy device were evaluated in the first 50 patients who underwent 53 such procedures at the Mayo Clinic. This treatment was used for atheromatous lesions in 27 patients and for restenosis after percutaneous transluminal coronary angioplasty in 23; in 3 patients, it was repeated for recurrent stenosis (2) or a persistent intimal flap (1). Successful results, defined as a reduction of the stenosis by 40% or more in association with removal of tissue, absence of Q-wave infarction, and no need for a bypass surgical procedure during in-hospital follow-up, were achieved in 47 of the 53 procedures (89%). Atherectomy reduced the stenoses from a mean of 87% to 15%. Failures occurred in 6 of the 53 procedures (11%). Three of these patients subsequently underwent successful conventional balloon angioplasty, and three required surgical treatment. Six patients had minor complications--embolization of atheromatous material in two, intimal dissection in two, and side-branch occlusion and transient thrombosis in one each. Coronary atherectomy with use of this device promises to be a relatively safe and efficient treatment of coronary artery stenosis.