Biomedical subjects

P Djuran

Publications and source records attributed to P Djuran.

3 recordsLinked to original sources

PubMedDate not supplied

[Amyloid tumor in a patient on a regular hemodialysis program].

Amyloidosis is frequent complication in the patients subjected to hemodialysis, and is most frequently manifested in carpal tunnel syndrome, scapulohumeral periarthritis, osseous cysts and exceptionally as solitary tumor. A patient in presented, aged 72 years, who had undergone chronic dialysis for 10 years, in the last 4 years with symptoms and signs of amyloidosis, such as scapulohumeral periarthritis and erosive arthritis of the knee with recurrent effusions. A year ago he had noticed a tumor in the left popliteal cavity that had been progressively increasing and had limited the movements of the knee. After the extirpation, the diagnosis of amyloid tumor was confirmed by histopathologic analysis.

Aged↗

PubMedDate not supplied

[The effect of cell phones on pacemaker function].

UNLABELLED: The aim of the study was to examine if there existed a risk from interference of cellular phones on patients with implanted permanent pacemakers. The study comprised 144 patients (134 VVI/VVIR and 10 DDD/DDDR) with permanent pacemakers of different manufactures. METHODS: During the routine pacemaker check, cellular phone aerial (Nokia 1610; GSM Standard) was placed against the skin of patients above the spot of pacemaker implantation, while the phone calls were repeated and ECG was continuously monitored. The effect of cellular phone on pacemaker was established upon: a) preexisting parameters of electric pacemaker stimulation; b) minimal ventricular rate of 90 beats/min, while electric stimulation parameters were set to their most sensitive values (MSV). RESULTS: Only in 9 (6.25%) patients was observed intermittent pacemaker inhibition, when pacemaker settings were on preexisting values of electric stimulation, while in 17 patients (11.8%) inhibition was noticed, when pacemaker settings were changed to their MSV. Besides, programmed values of electric stimulation in our patients remained unchanged. CONCLUSION: Although the electromagnetic interference interactions of cellular phones on pacemaker function were observed in relatively small number of our patients, we were of the opinion that pacemaker-dependent patients should avoid the use of cellular phones.

Adult↗

PubMedDate not supplied

[Significance of QT dispersion in the onset of ventricular arrhythmia in patients with heart failure].

UNLABELLED: Prolonged QT dispersion which has been proposed as a marker of repolarisation inhomogeneity, may predispose to ventricular arrhythmias in a variety of cardiac disorders. The aim of this study was to compare some indices of QT dispersion in patients with heart failure compared to normal subjects. We have also tested the hypothesis that QT dispersion is a useful method for identifying the patients at high risk for ventricular arrhythmias. METHODS: There were 84 patients, divided into two groups. In the first group there were 62 patients with heart failure, in the sinus rhythm, while in second group there were 22 sex- and age-matched healthy subjects. Simultaneous 12-channel ECGs were recorded at a paper speed 50 mm/sec. Ventricular arrhythmias were quantified by 24-h Holter ECG and classified according to the Lown classification system. Only those patients with a class IVa, IVb, and V arrhythmia were considered to have complex ventricular premature contractions (PVCs). Measurements of QT, JT, and RR intervals were performed manually. Heart rate corrected QT and JT intervals (QTc and JTc) were calculated by Bazett's formula. RESULTS: RR intervals were similar in both groups (862 +/- 120 vs 840 +/- 86; ns). QT dispersion and rate corrected QT dispersion were significantly greater in heart failure patients than in controls (76 +/- 13 ms vs 37 +/- 11 ms and 89 +/- 21 ms vs 40 +/- 17 ms; p < 0.05). When, on the basis of the existing complex PVCs, heart failure patients were divided into two subgroups, QT dispersion and rate corrected QT dispersion were significantly greater in the subgroup with complex PVCs compared to patients without complex PVCs (84 +/- 14 ms vs 61 +/- 18 ms and 98 +/- 26 ms vs 66 +/- 21 ms; p < 0.05). CONCLUSION: All indices of QT dispersion were significantly higher in heart failure patients. QT dispersion is useful, noninvasive method for identifying heart failure patients at high risk for ventricular arrhythmia.

Electrocardiography↗