ABSTRACT
BACKGROUND: QT dispersion (QTD) represents the inhomogeneity of ventricular repolarization and has been suggested to predict ventricular arrhythmia in patients with coronary artery disease. The purpose of this article is to study the characteristics of QTD during recovery phase after maximal treadmill exercise in airlines pilots. METHODS: The study population included 45 healthy airlines pilots. QTpeak D (QTpD) was defined as the difference between maximum and minimum QTp interval measured on 12 lead ECG at single cardiac beat. Paired t test was used between QTpD at rest and QTpD during recovery phase after maximal treadmill exercise. RESULTS: The QTpD at early recovery phase (1 minute) after maxial treadmill exercise was significantly decreased compared to QTpD at rest (22+/-11 msec. vs 27+/-12 msec., P<0.05), but there was no significant difference between QTpD at rest and QTpD at late recovery phases (3 minutes, 5 minutes and 7 minutes). CONCLUSION: This finding suggests that antiarrhythmogenic effect is present at early recovery phase (1 minute) after maxial treadmill exercise in healthy airlines pilots.
Subject(s)
Humans , Arrhythmias, Cardiac , Coronary Artery Disease , ElectrocardiographyABSTRACT
Four cases of congenital coronary arteriovenous fistula were diagnosed using coronary angiography. Three cases had fistula-related chest pain and the remaining case showed no symptoms but displayed electrocardiographic changes suggesting myocardial ischemia. As he was elderly and had a potential for future complications, we decided to close the fistulas of all cases. Three cases were closed with transcatheter coil embolization and one with surgical ligation due to a suspicious accompanying pericardial cyst. None of the patients demonstrated periprocedural or perioperative complications and all were relieved from symptoms during the 2 year follow-up period. We concluded that transcatheter coil embolization and surgical ligation are effective methods for use in the management of coronary arteriovenous fistula.
Subject(s)
Aged , Humans , Arteriovenous Fistula , Chest Pain , Coronary Angiography , Coronary Disease , Electrocardiography , Embolization, Therapeutic , Fistula , Follow-Up Studies , Ligation , Mediastinal Cyst , Myocardial IschemiaABSTRACT
Parvovirus B19 infection is known to cause chronic anemia in immunocompromised hosts, including organ transplant recipients. We report a case of pure red cell aplasia caused by parvovirus B19 in renal transplants. The patient was 16-year-old male who was diagnosed as chronic renal failure 7 years ago and had been on hemodialysis twice a week. He got renal transplantation in June 1999. But anemia was not improved in first postoperative period. On admission hemoglobin was 43.0 g/L, hematocrit was 12.7%. The bone marrow biopsy revealed severe erythroid hypoplasia with giant pronormoblasts. The pronormoblasia with giant prominent intranuclear inclusions, characteristic of parvovirus B19 infection. The parvovirus B19 PCR and anti-parvovirus B19 IgM were positive. The patient was treated with intravenous immunoglobulin and then reticulocyte count was increased 5 days later. Hemoglobin level restored to 104 g/L teo months later.
Subject(s)
Adolescent , Humans , Male , Anemia , Biopsy , Bone Marrow , Erythroblasts , Hematocrit , Immunocompromised Host , Immunoglobulin M , Immunoglobulins , Intranuclear Inclusion Bodies , Kidney Failure, Chronic , Kidney Transplantation , Parvovirus , Polymerase Chain Reaction , Postoperative Period , Red-Cell Aplasia, Pure , Renal Dialysis , Reticulocyte Count , TransplantsABSTRACT
BACKGROUND AND OBJECT: We intended to assess the characteristics of ST segment deviation in lateral leads(aVL, I, V5, V6) in patients with acute inferior myocardial infarction(AIMI) and find out the relationship with culprit arteries. MATERIALS AND METHOD: The subjects were 51 patients diagnosed as AIMI by standard electrocardiogram, cardiac enzymes and typical chest pain. Subjects were devided into two groups by angiographically proven culprit arteries ; left circumflex artery(LCx) group and right coronary artery(RCA) group. We compared the frequencies of ST segment depression more than 1 mm and less than 1 mm in aVL and I, and ST segment elevation more than 0.5 mm and less than 0.5 mm in V5 and V6 in each culprit artery group. RESULTS: Among 51 patients with AIMI, 42 were RCA group and 9 were LCx group. The frequency of ST segment depression more than 1 mm in aVL was 44% in LCx group and 71% in RCA group(p=0.140). 11% of LCx group and 43% of RCA group showed more than 1 mm ST segment depression in lead I (p=0.128). 56% of LCx group showed more than 0.5 mm ST segment elevation in V5 and V6 and 81% of RCA group showed less than 0.5 mm ST segment elevation in V5 and V6 (p=0.036). CONCLUSION: Culprit arteries in patients with AIMI and ST segment deviation in V5 and V6 are significantly related with each other. ST segment elevation more than 0.5 mm in V5 and V6 was predominantly found in LCx group than RCA group. Observation for ST segment deviation in lateral precordial lead V5 and V6 would be important in predicting the culprit artery in AIMI.