“Her QT interval is…”Alex couldn’t breathe.Catherine hummed softly behind her, peeling at a sticker, the small ordinary sound stretching the silence thinner and thinner.“…prolonged,” Dr. Park finished. “Not severely. But measurably longer than her baseline.”The word landed like something physical.Prolonged.Alex heard the rest as if through water.“…increased from 420 to 445 milliseconds…”“…borderline to mild prolongation…”“…not immediate danger but clinically significant…”“Say that again,” she managed. “Slowly.”Dr. Park pulled his stool closer, bringing himself to her eye level.“Catherine’s QT interval has increased from her baseline of 420 milliseconds to 445 milliseconds today. That’s a twenty-five millisecond change. In cardiology, that’s significant.”Significant.Alex gripped the edge of the exam table to steady herself.“What does that mean?” she asked, her voice distant to her own ears.“Let me show you.”He laid the EKG strip flat on the desk, smoothing it with care
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