Fig. 2From: S1-induced vasospastic angina—diagnostic utility of Holter ECG: a report of a caseHolter electrocardiogram (ECG). The patient’s ECG was continuously monitored on day 4 of treatment. Holter ECG revealed that ST segment elevations appeared together with angina (upper panel) and were followed by short-run tachycardia 1 min later (middle panel). The abnormal findings on ECG disappeared 4 min after sublingual nitroglycerin administration (lower panel)Back to article page