Table 3. Presentation, Clinical Course, and Follow-up of 54 Patients with Myocarditis after Vaccination.^*.

Variable	Value
Presenting symptoms and signs — no./total no. (%)
Chest pain	44/54 (81)
Palpitations	1/54 (2)
Dyspnea	3/54 (6)
Fever	5/54 (9)
Pericardial effusion	10/49 (20)
Vital signs on admission
Temperature — °C	37.4±1.0
Blood pressure — mm Hg
Systolic	122.7±16.8
Diastolic	72.2±11.0
Heart rate — beats per min	81.3±17.3
Shock — no./total no. (%)	1/47 (2)
Electrocardiographic findings — no./total no. (%)
Normal	8/38 (21)
ST-segment elevation
Diffuse	18/38 (47)
Nondiffuse	2/38 (5)
T-wave change	7/38 (18)
Atrial fibrillation	1/38 (3)
Nonsustained ventricular tachycardia	2/38 (5)
Laboratory values†
Elevated troponin T — no./total no. (%)	41/41 (100)
Median creatine kinase (IQR) — U/liter	487 (230–1193)
Clinical course during index hospitalization — no./total no. (%)
Need for inotropes or vasopressors	1/49 (2)
Need for mechanical circulatory support	1/49 (2)
Arrhythmias	1/49 (2)

^*Plus–minus values are means ±SD. Data for temperature, blood pressure, and heart rate were available in 37 patients and for the creatine kinase level in 28 patients.

^†Reference ranges for the laboratory tests are as follows: troponin T, 0 to 14 ng per liter; and creatine kinase, 20 to 180 U per liter. Additional data regarding presentation, clinical course, and follow-up are provided in Table S3.