Atrioventricular Conduction Abnormalities in Multisystem Inflammatory Syndrome in Children

Table 2

Laboratory and cardiac findings.

Peak laboratory findings
Covid PCR (nasopharyngeal)	−	−		−
Covid AB	+	+		+
Procalcitonin (ng/mL)	6.77	19.3		7.66	<0.10
CRP (mg/L)	333.6	285		224	<5
BNP(pg/mL)	17286	30817		27495	<450
Lactic acid (mmol/L)	2	6		2.6	0.5–1.9
IL-6 (pg/mL)	<2	−		44.8	<2.0
D-dimer (ug/mL)	3.74	14.01		6.58	0–0.5
PT/INR/PTT	17.2/1.4/30.1	19.3/1.62/46		83/109	PT: 11.5–14.9 INR: 0.8–1.2 PTT: 22.0–38.0
Fibrinogen (mg/dL)	531	502		549	188–468
Alk Phs/ALT/AST	75/163/86	186/179/82		133/138	Alk Phs: 142–335; ALT: < 51; AST: <46
CPK	683	901		1169	24–200
Ferritin	548	20814		1169	24–336
AKI (BUN/Cr)	25/1.39	70/3.3		13/0.86	Age Dependent
Cardiac findings
Peak troponin (ng/mL)	0.41	0.33	<0.01
Presenting ECG	Sinus tach incomplete RBBB^π	Sinus tachycardia	Sinus rhythm
Presenting PR (ms)	197	141	135
Cardiac rhythms	Complete, first- and second-degree heart block; prolonged PR, QT	Sinus tachycardia, prolonged QT (592 ms)	Sinus arrhythmia, sinus brady, RBBB^π, junctional rhythm,
Time after symptom presentation till arrhythmia onset	Complete AV—9 days	Prolonged QT—9 days	RBBB^π—8 days
Time from onset of IVIG^Ѱ till arrhythmia eliminated	4	2	3

^ΠRight bundle branch block. ^ѰIntravenous immunoglobulin.