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P Pothen

Publications and source records attributed to P Pothen.

5 recordsLinked to original sources
PubMed1992

Comparison of ST segment changes on standard and Holter electrocardiogram during exercise testing.

In order to compare the ST segment changes recorded simultaneously on Holter (Del Mar Avionics 445B recorder and DCG VII Scanner) and standard electrocardiogram, 22 patients with chest discomfort and normal resting ECG were evaluated during exercise testing. The conventional ECG was recorded using chest lead V5 and a modified lead II. The Holter recording was done using the bipolar chest lead CM5 and the same modified lead II. Bifurcating electrodes permitted simultaneous recording of electrocardiogram on both systems from the same electrode sites. Seven of the 22 patients had a positive test and 15 had a negative test by both systems. In 7 positive cases the amplitude of ST segment depression was compared. The Holter lead CM5 showed higher amplitude of ST segment depressions in 6 cases compared to the conventional lead V5: 3 cases by 0.5 mm; 2 cases by 1 mm and 1 case by 2.5 mm. In 1 case it was identical. The amplitude of ST segment depression in lead CM5 ranged from 1 to 3.5 mm (mean 2.2 +/- 0.6 mm) and in lead V5 from 1 to 2.5 mm (mean 1.5 +/- 0.6 mm). Thus the amplitude of ST depression was higher in lead CM5 by a mean of 0.7 mm compared to the lead V5. ST segment depression was present only in 6 cases in the modified lead II. ST segment depressions were reproduced faithfully in 3 patients and within the variation of 0.5 mm in other 3 cases by the Holter system.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1990

[Familial hypertrophic myocardiopathy: complex ventricular arrhythmias in healthy family members].

The aim of the present study was to evaluate the electrocardiographic changes among the members of a family affected by hypertrophic cardiomyopathy. Seventeen unaffected members and 8 affected members were studied by 24-hour Holter monitoring. Twenty-five normal controls were also studied by 24-hour Holter monitoring. One out of 7 (12.5%) patients with hypertrophic cardiomyopathy, 8 out of 17 (47%) unaffected relatives and 20 out of 25 (80%) controls did not show ventricular arrhythmias. One out of 7 patients (12.5%), 4 out of 17 (23.5%) unaffected relatives and 3 out of 25 (12%) of the control group showed Lown classes I-II ventricular arrhythmias. Complex ventricular arrhythmias (III-V Lown classes) were detected in 5/7 (71.4%) of patients, in 5/17 (29.5%) of unaffected members and only in 2/25 (8%) of the normals. Among the unaffected members we compared the prevalence of complex ventricular arrhythmias between the offspring of patients with that of the unaffected first-grade relatives. Three out 7 (43%) of the offspring of the patients showed complex ventricular arrhythmias and none among the offspring of normal first-grade relatives showed such arrhythmias. Neither the patients nor their relatives in this study showed any significant ST segment changes during the 24-hour Holter monitoring. We suggest that in first-grade relatives of patients with familial hypertrophic cardiomyopathy, complex ventricular arrhythmias could be a marker of latent disease, without clinical and echocardiographic manifestations.

Adolescent↗
PubMed1990

[Stroke: Holter monitoring in 15 hypertensive patients].

The objective of the study is to evaluate the prevalence of ventricular arrhythmias during acute stroke in hypertensive patients: 15 hypertensive patients (9 males and 6 females; mean age 56 +/- 5) without clinical and electrocardiographic evidence of organic heart disease underwent 24 hour Holter monitoring during acute stroke. Another group of 15 uncomplicated hypertensive patients (14 males and 1 female, mean age 49 +/- 5) without clinical and electrocardiographic evidence of organic heart disease underwent 24 hours Holter monitoring as controls. The Holter monitoring was repeated in 8 patients who survived during follow-up, after a mean period of 15 months: 13/15 (86%) patients with acute stroke had ventricular arrhythmias against the 7/15 (47%) in the control group. Moreover 9/15 (60%) of patients with stroke had complex ventricular arrhythmias against the 3/15 (20%) in the control group; 6/8 patients who survived stroke, during follow-up showed complex ventricular arrhythmias but the degree of severity was lower when compared to the acute phase; 9 patients during acute stroke showed episodes of prolongation of QTc interval during Holter monitoring. The systolic blood pressure was found generally higher during the acute phase of stroke than before. Our results show higher prevalence of ventricular arrhythmias especially of the complex forms during acute stroke in hypertensive patients.

Adult↗
PubMedDate not supplied

[Syncope in childhood].

Syncope may be defined a sudden and transient loss of consciousness due to a reversible alteration of brain function. Three main groups of syncopes can be identified: cardiac, vascular and non-cardiovascular. All the patients (63) admitted to the emergency unit of Pediatric Clinic of the University of Padua from January 83 to July 84 and reporting one or more episodes of loss of consciousness were examined. Their age ranged from 1 month to 15 years. All the patients were investigated with the same study protocol: ECG, EEG, 24 hours ECG monitoring, routine blood examinations; other tests were done when needed. The cause of syncope was established in 53,8% of cases; for 6,3% of patients the cause was cardiac (arrhythmic), in 38% it was vascular (vasovagal syncope), in 6,3% it was non-cardiovascular (neurologic or metabolic). The cause of syncope was not identified in 46% of the patients, which is also in agreement with other studies. However, we were able, through the use of our protocol, to identify quickly and non invasively the etiology of the syncope in 25% of the patients.

Adolescent↗