Validating the Thoracic Revised Cardiac Risk Index Following Lung Resection

Area of Science:

• Cardiology
• Thoracic Surgery
• Medical Risk Stratification

Background:

• The Thoracic Revised Cardiac Index (ThRCRI) classifies patients for lung resection suitability.
• It differentiates between patients who can proceed to surgery (Classes A/B) and those needing further cardiac evaluation (Classes C/D).

Purpose of the Study:

• To evaluate the ThRCRI's ability to stratify patients based on major cardiac complication rates.
• To validate the ThRCRI using a large, multi-institutional dataset.

Main Methods:

• Analysis of 4,625 patients undergoing lobectomy or pneumonectomy (2005-2012) from the ACS NSQIP dataset.
• Patients were categorized into four risk classes (A-D) based on preoperative factors: ischemic heart disease, cerebrovascular disease, renal comorbidity, and pneumonectomy.
• The primary outcome measured was the incidence of perioperative major cardiac complications.

Main Results:

• The overall incidence of cardiac complications was 2%.
• Cardiac complication rates varied significantly across risk classes: Class A (1%), Class B (3%), Class C (9%), and Class D (4%) (p < 0.01).
• Most patients (78%) had malignant disease, and 70% underwent open procedures.

Conclusions:

• The ThRCRI is a valuable preoperative tool for stratifying cardiac risk in patients undergoing lung resection.
• It effectively identifies patients (Classes C and D) at higher risk for major cardiac complications.
• The ThRCRI assists in identifying individuals who would benefit from additional cardiac evaluation prior to surgery.