This study aims to evaluate the impact of using propranolol, a non-selective beta-blocker, on preventing myocardial injury after non-cardiac surgery (MINS) in breast cancer patients who also have hypertension or angina. Stress from surgery and anesthesia can increase sympathetic activity and inflammation, which may lead to heart stress. This pragmatic clinical trial will compare patients who are prescribed propranolol as part of their routine care with those who are not. Researchers will analyze blood samples and surgical tissues collected during normal treatment to observe changes in heart health and the tumor microenvironment.
Breast cancer is the most common malignancy among women in Korea. Perioperative stress and acute physiological stimuli from surgery and anesthesia increase catecholamine secretion, which can lead to Myocardial Injury after Non-cardiac Surgery (MINS). Propranolol is known to stabilize hemodynamic variability by inhibiting sympathetic surge and reducing myocardial oxygen consumption. Recent studies also suggest that beta-blockers may influence the tumor microenvironment (TME) by reducing inflammation and regulating immune cell composition.This prospective, randomized, open-label, single-center pragmatic clinical trial will enroll 100 female patients (aged 20-70) with stage I-III breast cancer and comorbid hypertension or angina. Participants will be randomized 1:1 into two groups: 1. Propranolol Group: Patients receive propranolol for at least 14 days before surgery. 2. Non-Propranolol Group: Patients receive usual care without propranolol.The primary objective is to compare the incidence of MINS based on high-sensitivity Troponin T (hs-TnT) levels measured postoperatively. Exploratory objectives include analyzing markers of inflammation (CRP, LDH), tumor proliferation (Ki-67), and tumor-infiltrating lymphocytes (TILs) using blood and tissue samples naturally obtained during the clinical process. Long-term follow-up will be conducted for up to 5 years to evaluate recurrence and survival outcomes.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
100
Propranolol (dosage based on clinical indication) for at least 14 days before surgery until the morning of the operation.
Standard medical management (e.g., CCB, ACEi, ARB, or diuretics) at the physician's discretion, excluding beta-blockers.
Seoul St. Mary's Hospital, The Catholic University of Korea
Seoul, Seoul, South Korea
Incidence of Myocardial Injury after Noncardiac Surgery (MINS)
MINS is defined as an elevated high-sensitivity cardiac Troponin T (hs-TnT) level measured for clinical purposes after surgery that exceeds the 99th percentile upper reference limit. Specifically, it is defined as: 1. 0.02-0.065 ng/mL with an absolute change of more than 0.005ng/mL or 2. any elevation ≥0.065 ng/mL or any absolute change more than 0.014 ng/mL
Time frame: From the day of surgery (Day 0) up to 30 days postoperatively
Perioperative Hemodynamic Stability: Systolic Blood Pressure Fluctuation
Comparison of the fluctuation range of blood pressure during surgery and in the recovery room (up to 2hours post-surgery)
Time frame: During surgery and in the recovery room (up to 2hours post-surgery)(Day 0)
Perioperative Hemodynamic Stability: Heart rate Fluctuation
Comparison of the fluctuation range of Heart rate during surgery and in the recovery room (up to 2hours post-surgery)
Time frame: During surgery and in the recovery room (up to 2hours post-surgery)(Day 0)
Postoperative Cardiovascular and Respiratory Complications Rate
Incidence of major cardiovascular and respiratory complications, including MI, CVA, MINS, and pulmonary complications.
Time frame: Within 30 days after surgery
length of hospital stay
Total number of days from the date of surgery to the date of discharge.
Time frame: Within 30 days after surgery
Change in Patient-Reported Anxiety (HADS-A)
Evaluation of the change in anxiety levels using the Hospital Anxiety and Depression Scale-Anxiety (HADS-A) subscale. The score ranges from 0 to 21, with higher scores indicating higher anxiety.
Time frame: Baseline (Screening), Just before surgery (Day 0), and 6 months after surgery
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