Biomaterial Database

Dual atrioventricular nodal pathways: a common electrophysiologic response in children. 1979

M K Thapar, and P C Gillette

Electrophysiologic investigation was performed on 61 children and young adults during evaluation of either cardiac dysrhythmia or pre- or postoperative congenital heart disease. The results of these studies were reviewed retrospectively to determine if longitudinal dissociation of the atrioventricular node (AVN) was present. Dual AVN pathways were detected by the atrial extrastimulus technique, using His bundle electrograms. A discontinuous H1H2 response curve indicated the presence of dual AVN pathways. There was a higher incidence of dual AVN pathways in patients with clinically evident paroxysmal supraventricular tachycardia (PSVT) than in those without PSVT. Dual AVN pathways were equally prevalent in children with corrected and uncorrected congenital cardiac defects.

UI	MeSH Term	Description	Entries
D007223	Infant	A child between 1 and 23 months of age.	Infants
D011666	Pulmonary Valve Stenosis	The pathologic narrowing of the orifice of the PULMONARY VALVE. This lesion restricts blood outflow from the RIGHT VENTRICLE to the PULMONARY ARTERY. When the trileaflet valve is fused into an imperforate membrane, the blockage is complete.	Pulmonary Stenosis,Pulmonary Stenoses,Pulmonary Valve Stenoses,Pulmonic Stenosis,Stenoses, Pulmonary,Stenoses, Pulmonary Valve,Stenosis, Pulmonary,Stenosis, Pulmonary Valve,Valvular Pulmonic Stenosis,Pulmonary Stenose,Pulmonic Stenoses,Pulmonic Stenoses, Valvular,Pulmonic Stenosis, Valvular,Stenose, Pulmonary,Stenoses, Pulmonic,Stenosis, Pulmonic,Valvular Pulmonic Stenoses
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D002675	Child, Preschool	A child between the ages of 2 and 5.	Children, Preschool,Preschool Child,Preschool Children
D004594	Electrophysiology	The study of the generation and behavior of electrical charges in living organisms particularly the nervous system and the effects of electricity on living organisms.
D004699	Endocardium	The innermost layer of the heart, comprised of endothelial cells.	Endocardiums
D006329	Heart Conduction System	An impulse-conducting system composed of modified cardiac muscle, having the power of spontaneous rhythmicity and conduction more highly developed than the rest of the heart.	Conduction System, Heart,Conduction Systems, Heart,Heart Conduction Systems,System, Heart Conduction,Systems, Heart Conduction
D006330	Heart Defects, Congenital	Developmental abnormalities involving structures of the heart. These defects are present at birth but may be discovered later in life.	Congenital Heart Disease,Heart Abnormalities,Abnormality, Heart,Congenital Heart Defect,Congenital Heart Defects,Defects, Congenital Heart,Heart Defect, Congenital,Heart, Malformation Of,Congenital Heart Diseases,Defect, Congenital Heart,Disease, Congenital Heart,Heart Abnormality,Heart Disease, Congenital,Malformation Of Heart,Malformation Of Hearts
D006344	Heart Septal Defects, Atrial	Developmental abnormalities in any portion of the ATRIAL SEPTUM resulting in abnormal communications between the two upper chambers of the heart. Classification of atrial septal defects is based on location of the communication and types of incomplete fusion of atrial septa with the ENDOCARDIAL CUSHIONS in the fetal heart. They include ostium primum, ostium secundum, sinus venosus, and coronary sinus defects.	Atrial Septal Defects,Ostium Primum Atrial Septal Defect,Persistent Ostium Primum,Atrial Septal Defect,Atrial Septal Defect Ostium Primum,Ostium Secundum Atrial Septal Defect,Defect, Atrial Septal,Ostium Primum, Persistent,Primum, Persistent Ostium,Septal Defect, Atrial
D006345	Heart Septal Defects, Ventricular	Developmental abnormalities in any portion of the VENTRICULAR SEPTUM resulting in abnormal communications between the two lower chambers of the heart. Classification of ventricular septal defects is based on location of the communication, such as perimembranous, inlet, outlet (infundibular), central muscular, marginal muscular, or apical muscular defect.	Ventricular Septal Defects,Intraventricular Septal Defects,Ventricular Septal Defect,Defect, Intraventricular Septal,Defect, Ventricular Septal,Defects, Intraventricular Septal,Intraventricular Septal Defect,Septal Defect, Intraventricular,Septal Defect, Ventricular,Septal Defects, Intraventricular,Septal Defects, Ventricular