This study aims to compare the effectiveness of two regional anesthesia techniques in managing pain for participants undergoing cardiac surgery via sternotomy. The investigators will evaluate whether the Erector Spinae Plane Block (ESPB) or a combination of the Superficial Parasternal Intercostal Plane Block (SPIPB) and Serratus Anterior Plane Block (SAPB) provides better pain control and recovery outcomes.
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Pain Intensity (Visual Analog Scale Score)
Timeframe: At 0, 1, 2, 4, 8, 12, 16 and 24 hours postoperatively.