PubMed Health⌕ Search

Biomedical subjects

F Di Maio

Publications and source records attributed to F Di Maio.

At least 19 recordsLinked to original sources
PubMed2001

Effects of cardiac rehabilitation on atrial wave in patients after myocardial infarction.

Cardiac rehabilitation (CR) can improve cardiac hemodynamic performance in patients after myocardial infarction (MI). Little evidence is provided concerning the consequences of CR on atrial wave duration, and less is known about the link between pre-arrhythmogenic patterns and the cardiovascular performance improvement in these subjects. Twenty-six patients, post-MI 0 to 7 days, underwent a complete CR cycle and a signal-averaged electrocardiogram (SAECG) for the evaluation of atrial activation parameters (group 1) to appreciate if physical training can promote parallel improvement in cardiovascular and intra-atrial conduction parameters. A control group of 24 well-matched nonischemic subjects (group 2) was chosen for data comparison. Resting heart rate (p < 0.01) and resting double product (p < 0.01) decreased after CR in groups 1 and 2, while diastolic blood pressure at maximal stress was decreased in group 1 (p < 0.01) with a parallel increase in the time of physical training (p < 0.05). SAECG parameters of atrial activation were unchanged in group 1 after the comparison and only total atrial duration activation (dA) reached statistical significance (113.3 +/- 17.2 msec vs 120.8 +/- 14.2 msec, subjects after CR vs before CR, p < 0.01). CR could improve intra-atrial activation in subjects after MI, but the consequences of hemodynamic adjustment of the trained heart must undergo a more accurate evaluation to verify if CR can prevent adverse arrhythmogenic complications of MI through cardiovascular performance improvement.

Blood Pressure↗
PubMed1999

Spectral analysis of heart rate variability in elderly non-dipper hypertensive patients.

To assess by autoregressive model the frequency domain heart rate variability (HRV) during clinostatism and after passive orthostatic load (head-up tilt), 81 hypertensive and normotensive subjects (42 men and 39 women) were subdivided into four groups: 20 adult normotensive subjects (Group 1); 21 elderly normotensive subjects (Group 2); 20 elderly hypertensive subjects with nocturnal blood pressure (BP) falls (Group 3); and 20 elderly hypertensive subjects without nocturnal BP falls (Group 4). They were chosen to assess the influence of aging and arterial hypertension on sympathetic-parasympathetic balance. The age-related decrease observed in nearly all HRV spectral frequency components (normalised units [NUs], high frequency [HF] and low frequency [LF]) was reported in elderly patients in rest conditions. LF indexes resulted in decreases in Group 3 and these data seemed to be emphasised in Group 4. After passive tilt, spectral data were recorded as follows: 25.3+/-1.8 vs 17.8+/-2.2 HF, Group 2 vs Group 1, P<0.001; 72.5+/-0.8 vs 75.6+/-1.8 LF, P< 0.001, Group 2 vs Group 1. Both sympathetic and parasympathetic indexes were lower in Group 3 (44.6+/-1.1 vs 72.5+/-0.8 LF, P< 0.001, Group 3 vs Group 2; 9.9+/-1.8 vs 25.3+/-1.8 HF, P < 0.001, Group 3 vs Group 2) and data became clearer in Group 4 (8.5 2.1 vs 9.9+/-1.8 HF, P< 0.001; 40.4+/-1.5 vs 44.6+/-1.1 LF, Group 4 vs Group 3). The established influence of aging on autonomic nervous system activity appears to be increased by arterial hypertension due to worsening of the sympathetic-parasympathetic response to standardised stimulation. The loss of nocturnal BP declines in arterial hypertension was found to occur in association with a decrease in autonomic nervous system activity.

Adult↗
PubMed1993

[Behçet disease. Description of three cases with manifestations at multiple localizations. Current status of understanding].

On the basis of their personal experience and of a review of the literature, the authors stress that in view of its multiple localizations Behçet's disease must be considered a systemic disorder. The authors further stress the importance of recognizing by new and more suitable diagnostic methods all atypical localizations of this pathology in order to ensure early detection and appropriate management.

Adult↗
PubMed1992

[Horton's bitemporal arteritis. A case report].

The authors report a case of Horton's arteritis in a woman (aged 76) presented some peculiarities. The arteritis simultaneously interested both superficial temporal arteries; in a second time caused a bilateral "claudicatio masticationis"; induced a worsening of extrapyramidal symptoms from which the patient had been suffering for many years, due to the possible involvement also of the endocranial arteries. The histologic picture on a biopsy of the left temporal artery was typical of the Horton's disease, but without giant cells; the authors suppose that this is due to a therapy with FANS administered before carrying out the biopsy. The patient was treated with cortisone per os at a low dosage, causing a quick regression of the symptoms and a normalization of the laboratory tests. Also this result differs from what most authors have observed: they maintain that Horton's arteritis has become rather resistant to the cortisone therapy and required high dosage for a very long time. The authors maintain that precocity of diagnosis and an immediate treatment can influence in a significant way the course of the disease.

Aged↗
PubMed1987

Analysis of high-resolution atrial activation: report on 403 cases.

The findings of a study carried out on a sample of 403 P waves, selected over the 50 to 300 Hz frequency range, by a portable microcomputer system capable of averaging 512 P waves, are reported. Detailed analysis of P waves was attempted in healthy subjects and in patients affected by pathologic processes where atrial involvement had been observed. An attempt was made to individualize P wave parameters which may be associated with these pathologic conditions. On each atrial signal a 512-point fast Fourier transform was used. The original sample was divided into 18 classes, and the mean values of some parameters of each class were computed. The results of fast Fourier transform computing and of the mean values of parameters for both patients and healthy subjects show two different behaviors with respect to the amplitude-frequency relationships and mean peak-to-peak amplitude, respectively. The present results indicate that this technique may be useful for further detailed analysis of P waves.

Adult↗
PubMed1984

High resolution atrial depolarization of MZ twins detected by surface signal averaging technique.

High resolution tracings of atrial depolarization can be obtained by surface signal averaging technique. A study was conducted on 4 male and 4 female healthy MZ twin pairs aged 10.4 +/- 1.3 yrs. Each subject underwent 3 or more recordings, at 10-days intervals. The essential reproducibility could be confirmed, with personal characteristics, as well as the reliability of the technique and the electrophysiological value of the spikes complex. In 3/8 pairs the cotwins showed a significant likeness of the atriogram, while in 5/8 pairs the tracings were not quite resembling between the twins and that is attributed to variations in the chronogenetic characteristics of MZ twins.

Atrial Function↗
PubMed1983

High resolution recordings of atrial flutter.

We present high resolution tracings of atrial flutter which, to our knowledge, have not been previously described. Two patients have been studied; in both cases atrial activity was made by waves similar to each other, differing only in voltage. We discuss the nature of these waves, which are probably related to continuous atrial activity, with a segregation into small and large waveform activity. It is concluded that high resolution recordings may be valid support for the interpretation of atrial flutter activity.

Atrial Flutter↗
PubMed1980

[Recording of His bundle potentials by means of non-invasive computerized and high-resolution electrocardiographic technique (author's transl)].

Recording of His bundle potentials by means of non invasive technique was first obtained in 1973. The Authors used a computerized, high resolution cardiograph to study 26 patients, 17 males and 9 females, mean age 57.15 +/- 21.79 years. H wave could be identified and therefore H-V interval could be calculated in 19 patients (73%). H wave identification is based on its morphological differentiation from other bioelectrical signals present in P-Q interval and on its repeated presence in all, or at least in the largest number of the six available leads. This technique, based on averaging process, is very useful in depistage of acute and chronic A-V conduction troubles.

Adolescent↗
PubMed1979

Activity of creatinol O-phosphate on persistent ventricular premature beats in ischemic heart disease. Double blind clinical trial.

In a double-blind investigation N-methyl-N-(beta-hydroxyethyl) guanidine O-phosphate (creatinol O-phosphate, COP) was checked versus a reference substance (solvent of COP) on volunteers affected by ischemic heart disease with persistent ventricular premature beats (VPB). COP was able to reduce VPB by 50--100% in 85% of the volunteers treated with this drug. This fact and the virtual absence of side-effects of COP lead the authors to the conclusion that COP merits more extensive investigations in this field in view of its clinical employment alone or in association with specific antiarrhythmic agents.

Aged↗