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Pericatheterization risk factors in left main coronary artery stenosis
Insights
Patients with left main coronary artery disease (CAD) face higher risks during cardiac catheterization. Angina before the procedure and catheter tip proximity to the lesion increase complication risks.
Area of Science:
- Cardiology
- Interventional Cardiology
Background:
- Left main (LM) coronary artery disease (CAD) is associated with a high incidence of complications during diagnostic cardiac catheterization.
- Identifying risk factors is crucial for improving patient safety.
Purpose of the Study:
- To identify pericatheterization risk factors for major complications in patients with LM CAD.
- To analyze variables associated with adverse events during cardiac catheterization in LM CAD patients.
Main Methods:
- Retrospective review of 107 consecutive LM CAD cases (stenosis ≥50%).
- Analysis of complications including ventricular fibrillation, angina, myocardial infarction, hypotension, and death.
- Comparison of risk factors between patients with and without complications.
Main Results:
- Patients experiencing angina within 24 hours before catheterization had a significantly higher complication rate (31% vs 7%).
- Catheter tip proximity to the LM lesion (≤6.0 mm) was associated with increased complications (24% vs 3%).
- No significant association found between complications and NYHA class, catheterization technique, ventriculography, injection details, stenosis severity, or hemodynamic parameters.
Conclusions:
- Pre-catheterization angina and close catheter tip proximity to the LM lesion are significant risk factors for major complications.
- These findings can inform procedural strategies to mitigate risks in LM CAD patients undergoing cardiac catheterization.
Abstract:
Patients with left main (LM) coronary artery disease (CAD) have an unexplained high incidence of complications during diagnostic cardiac catheterization. This study identifies pericatheterization risk factors for major complications in patients with LM CAD (stenosis at least 50%). Complications were defined as ventricular fibrillation not related temporally to coronary injection, persistent angina, acute myocardial infarction, profound hypotension and death during or within 24 hours of catheterization. One hundred seven consecutive cases of LM CAD (11 with complications and 96 without) were reviewed with respect to variables potentially related to complications. Patients who had angina in the 24 hours before catheterization were at increased risk. Four of 13 patients with angina (31%) and 7 of 94 (7%) without angina had complications (p less than 0.05). Distance from the catheter tip to the lesion also was related to complications (9 of 38 [24%] with tip 6.0 mm or less from lesion and 2 of 65 [3%] with tip more than 6.0 mm from lesion, p less than 0.05). No relaxation was found between complications and New York Heart Association functional class, technique (femoral vs brachial), performance of ventriculography, number of coronary injections, amount of contrast injected, severity of LM stenosis, number of major arteries with 75% or more diameter stenosis, mean arterial pressure, left ventricular end-diastolic pressure and left ventricular ejection fraction.