PMID- 3626019 OWN - NLM STAT- MEDLINE DCOM- 19871007 LR - 20190824 IS - 0021-4868 (Print) IS - 0021-4868 (Linking) VI - 28 IP - 3 DP - 1987 May TI - Study on congenital complete heart block in children by 24-hour ambulatory electrocardiographic monitoring. PG - 323-32 AB - Ambulatory electrocardiographic monitoring was performed in 18 children with a congenital complete heart block (CCHB). They had no cardiac structural anomalies. These patients could be divided into 3 groups according to the pattern of fluctuations in beat-to-beat ventricular rates. Type 1 patients showed rapid and transient fluctuations and demonstrated a high correlation between atrial and ventricular rates. Type 3 patients showed a constant ventricular rate and little variation through the 24 hour period and there was no appreciable correlation between atrial and ventricular rates. Twelve of 18 patients had additional arrhythmias. A few sporadic ventricular premature contractions (VPCs) were found in 9 patients, and bigeminy of VPCs or ventricular tachycardias were seen in 2 patients during exercise. Frequent and sudden prolongation of RR intervals was found during sleep in 3 patients. The longest intervals of ventricular asystoles were 7.2, 3.2 and 3.2 sec, respectively. The mechanism of this phenomenon appeared to be not only an exit block, but also arrest or a lack of automaticity of a subsidiary pacemaker. One of these patients developed frequent Stokes-Adams attacks. Type 3 patients with sudden prolongation of RR intervals and/or frequent ventricular arrhythmias should be under careful observation. Ambulatory electrocardiographic monitoring is recommended for children with CCHB for evaluation of potential risk factors for Stokes-Adams attacks. FAU - Nagashima, M AU - Nagashima M FAU - Nakashima, T AU - Nakashima T FAU - Asai, T AU - Asai T FAU - Matsushima, M AU - Matsushima M FAU - Ogawa, A AU - Ogawa A FAU - Ohsuga, A AU - Ohsuga A FAU - Kaneko, T AU - Kaneko T FAU - Yazaki, T AU - Yazaki T FAU - Okajima, M AU - Okajima M LA - eng PT - Journal Article PL - Japan TA - Jpn Heart J JT - Japanese heart journal JID - 0401175 SB - IM MH - Adolescent MH - Arrhythmias, Cardiac/classification/congenital/diagnosis MH - Child MH - Child, Preschool MH - *Circadian Rhythm MH - Electrocardiography/*methods MH - Female MH - Heart Block/classification/*congenital/diagnosis MH - Heart Rate MH - Humans MH - Infant MH - Male MH - Monitoring, Physiologic/*methods MH - Time Factors EDAT- 1987/05/01 00:00 MHDA- 1987/05/01 00:01 CRDT- 1987/05/01 00:00 PHST- 1987/05/01 00:00 [pubmed] PHST- 1987/05/01 00:01 [medline] PHST- 1987/05/01 00:00 [entrez] AID - 10.1536/ihj.28.323 [doi] PST - ppublish SO - Jpn Heart J. 1987 May;28(3):323-32. doi: 10.1536/ihj.28.323.