title: [The P wave in systemic arterial hypertension. Comparison with the echocardiogram and apexcardiogram].
abstract: The cause of an abnormal electrocardiographic P wave (AEPW) in systemic arterial hypertension (SAH) has not been delucidated. In order to demonstrate if this sign is related to volume overload of the left atrial cavity -previously we found no correlation between pressure overload of the cavity and the presence of an AEPW- 34 patients with SAH were studied; population were divided in two groups: group A (GA, n = 13), formed by 13 cases with a P wave more than 0.10 s duration (D2 standard lead) and group B integrated by 21 cases with a P wave at 0.10 s or less duration. In each cases phonocardiographic and echocardiographic (Mode M) studies were performed and the following data were obtained: "A" index (AI), left atrial dimension (LAD) and, septal (SD) and left posterior wall dimension (LPWD); besides: Sokolow electrocardiographic index (SI) and systolic (SBP) and diastolic (DBP) blood pressure. Results are shown in the following table: (Table: see text). There were not statistical differences between groups (data of SBP and DBP not shown). Correlation between LAD and AI and duration of P wave were not statistical different (data not shown). An AEPW in SAH does not seem to be cause by a volume left atrial overload. Possible it is related to an interatrial conduction defect.
authors.affiliation: Instituto Nacional de Cardiología Ignacio Chávez, México, D.F.
authors.forename: J A
authors.initials: JA
authors.lastname: González Pliego
authors.forename: G
authors.initials: G
authors.lastname: Sánchez Torres
authors.forename: J F
authors.initials: JF
authors.lastname: Guadalajara Boo
mesh_terms: D000328:Adult; D000368:Aged; D001794:Blood Pressure; D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000503:physiopathology; D006801:Humans; D006973:Hypertension / Q000503:physiopathology*; D007702:Kinetocardiography; D008297:Male; D008875:Middle Aged
vernacular_title: La onda P en la hipertensión arterial sistémica. Correlación con el ecocardiograma y el apexcardiograma.