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Stress testing termination criteria are divided into absolute (must stop) and relative (should consider stopping). Severe angina, sustained VT, and patient request are absolute reasons to stop immediately. A hypertensive response with systolic BP >250 mmHg is a relative indication—it warrants close observation and likely termination, but provider judgment may allow continuation in certain cases if patient is asymptomatic. Recognizing these categories ensures CCTs escalate appropriately, balancing patient safety with diagnostic value. Documentation of symptoms, vitals, and ECG changes guides accurate interpretation and risk stratification.

Atrial flutter produces atrial rates of ~250–350 bpm with characteristic sawtooth waves. With 2:1 AV conduction, the ventricular rate is ~150 bpm and regular. AF is irregular with no distinct flutter waves. SVT has narrow tachycardia without flutter waves. Sinus tachycardia has normal P waves. Identifying flutter patterns is critical for guiding anticoagulation and rhythm control.