The symptoms of early cardiovascular spasm manifest as transient chest tightness and chest pain or even syncope, manifesting as posterior sternal crushing pain, which can radiate to the left shoulder, the whole chest, and the left upper extremity. The ECG can show a transient ST-segment elevation during the attack, which usually does not exceed 20 minutes, and the ECG ST-segment completely falls back after the chest pain disappears. Patients with early cardiovascular spasm may undergo coronary CT or DSA coronary angiography, which may reveal stenosis during the angiography, but the degree of stenosis is mild and the stenosis is usually ≤50%. Typically, patients with early cardiovascular spasm are treated symptomatically with calcium antagonists, usually with nitrates, which provide timely relief.