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Mid-term follow-up of coronary artery aneurysm after directional coronary atherectomy

Y Imai1, K Hara, M Yamasaki

  • 1Department of Cardiology, Mitsui Memorial Hospital, Tokyo.

Journal of Cardiology
|May 4, 1999
PubMed

Insights

Coronary artery aneurysms (CAAs) after directional coronary atherectomy (DCA) are common. Deeper resection during DCA is linked to CAA formation, but these aneurysms show a good mid-term prognosis.

Area of Science:

  • Cardiology
  • Interventional Cardiology
  • Vascular Medicine

Background:

  • Coronary artery aneurysm (CAA) is a known complication following directional coronary atherectomy (DCA), occurring in 6-12% of lesions.
  • The long-term prognosis and optimal management strategies for DCA-related CAAs remain incompletely understood.

Purpose of the Study:

  • To evaluate the clinical course and mid-term prognosis of patients with coronary artery aneurysms (CAAs) that developed after directional coronary atherectomy (DCA).
  • To identify factors associated with the formation of DCA-related CAAs.

Main Methods:

  • A retrospective analysis of 214 consecutive patients who underwent DCA and were subsequently diagnosed with CAAs.
  • Follow-up coronary angiography was performed at 6 months and an average of 32 months post-DCA to assess aneurysm size and clinical outcomes.
  • Histological examination of atherectomy specimens was analyzed to correlate tissue resection depth with aneurysm formation.

Main Results:

  • Out of 193 patients with follow-up angiography, 14 lesions (14 patients) developed CAAs.
  • Twelve of the 14 patients with CAAs remained asymptomatic; two experienced new angina unrelated to the original DCA procedure.
  • Deeper subintimal resection during DCA was significantly associated with the development of CAAs (57% in CAA+ group vs. 31% in CAA- group).
  • Aneurysm size, relative to reference vessel diameter, increased significantly by 6 months post-DCA and remained stable thereafter.

Conclusions:

  • Coronary artery aneurysms following DCA appear to have a favorable mid-term prognosis, with most patients remaining asymptomatic.
  • The depth of tissue resection during directional coronary atherectomy is a significant predictor of coronary artery aneurysm formation.
  • Routine follow-up angiography is valuable for detecting and monitoring DCA-related CAAs.

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