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J Wave (j + wave)

Distribution by Scientific Domains
Medical Sciences100%

Selected Abstracts

Clinical Characteristics of Patients With Spontaneous or Inducible Ventricular Fibrillation Without Apparent Heart Disease Presenting with J Wave and ST Segment Elevation in Inferior Leads

JOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY, Issue 8 2000
MASAHTKO TAKAGI M.D., Ph.D.
Ventricular Fibrillation with J Wave in Inferior Leads. Introduction: The clinical characteristics of three patients with spontaneous or inducible ventricular fibrillation (VF) without apparent heart disease, who presented with J wave and ST segment elevation in inferior leads, are described. Methods and Results: All patients were male and experienced syncope. Their symptoms occurred at night or early in the morning. Holter ECG revealed infrequent premature ventricular complexes. Injection with disopyramide 2 mg/kg augmented ST segment elevation. Conclusion: These characteristics were very similar to those of patients with Brugada syndrome. These three patients with these specific features might have a variant of Brugada syndrome. [source]

Occurrence of "J Waves" in 12-Lead ECG as a Marker of Acute Ischemia and Their Cellular Basis

PACING AND CLINICAL ELECTROPHYSIOLOGY, Issue 6 2007
SHINDE RITUPARNA M.D.
The "J wave" (also referred to as "the Osborn wave,""the J deflection," or "the camel's hump") is a distinctive deflection occurring at the QRS-ST junction. In 1953, Dr. John Osborn described the "J wave" as an "injury current" resulting in ventricular fibrillation during experimental hypothermia. Although "J Wave" is supposed to be pathognomonic of hypothermia, it is seen in a host of other conditions such as hypercalcemia, brain injury, subarachnoid hemorrhage, cardiopulmonary arrest from over sedation, the Brugada syndrome, vasospastic angina, and idiopathic ventricular fibrillation. However, there is paucity of literature data as regards to ischemic etiology of "J Wave." In this article, we present a case where "J waves" were probably induced by ischemia. We also discuss the mechanism of ischemia-induced "J wave" accentuation and its prognostic implications. [source]

Clinical Characteristics of Patients With Spontaneous or Inducible Ventricular Fibrillation Without Apparent Heart Disease Presenting with J Wave and ST Segment Elevation in Inferior Leads

JOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY, Issue 8 2000
MASAHTKO TAKAGI M.D., Ph.D.
Ventricular Fibrillation with J Wave in Inferior Leads. Introduction: The clinical characteristics of three patients with spontaneous or inducible ventricular fibrillation (VF) without apparent heart disease, who presented with J wave and ST segment elevation in inferior leads, are described. Methods and Results: All patients were male and experienced syncope. Their symptoms occurred at night or early in the morning. Holter ECG revealed infrequent premature ventricular complexes. Injection with disopyramide 2 mg/kg augmented ST segment elevation. Conclusion: These characteristics were very similar to those of patients with Brugada syndrome. These three patients with these specific features might have a variant of Brugada syndrome. [source]

Hypothermia during the infusion of cryopreserved autologous peripheral stem cell causes electrocardiographical changes: Report of two cases

AMERICAN JOURNAL OF HEMATOLOGY, Issue 8 2006
Fahri Sahin
Abstract Currently, autologous peripheral stem cell transplantation used as a therapeutic modality in the treatment of various hematological malignancies is gaining more popularity day by day. In this method, the patient's own peripheral stem cells are collected by a proper method and stored at ,80°C until they are reinfused into the patient after being rewarmed in water bath at 37°C. A number of complications have been reported related to reinfusion of the cryopreserved cells into the patient. These may include noncardiovascular complications such as nausea, vomiting, flushing, abdominal pain, chest discomfort, and headache, as well as cardiovascular complications like arrhythmias, hypotension, and hypertension. Hypothermia related to rapid infusion has been reported as the main factor underlying the cardiovascular complications. Electrocardiographic findings of hypothermia include sinusal bradycardia, prolonged QT and PR intervals, widened QRS complexes, and J wave, which is a ECG abnormality characterized by supraventricular and ventricular arrhythmias. We here present two cases of giant J wave caused by hypothermia during infusion of cryopreserved autologous peripheral stem cell that is detected by ECG and regressed after infusion ceased. Am. J. Hematol. 81:627,630, 2006. © Wiley-Liss, Inc. [source]