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[Pseudo-ischemic electrocardiographic changes in the context of adrenal crisis].
Medicina (B Aires)
April 2024
Servicio de Medicina Interna, Hospital de Bolívar Dr. Miguel Capredoni, Bolívar, Buenos Aires, Argentina.
False-positive electrocardiographic changes during exercise test in a patient with pectus excavatum.
J Clin Ultrasound
November 2020
Cardiology and Cardiovascular Pathophysiology, Azienda Ospedaliero-Universitaria "S. Maria della Misericordia", Perugia, Italy.
Exercise-induced ST-segment changes simulating myocardial ischemia have been described in otherwise normal subjects during hyperventilation. We present the case of a 60-year-old man with pectus excavatum showing significant exercise-induced "pseudo-ischaemic" ST-segment changes with neither coronary artery disease nor anxiety-induced hyperventilation. We found no report of the possible causative role of a narrow antero-posterior chest diameter in inducing "pseudo-ischaemic" ST-segment changes during exercise stress test in the literature.
View Article and Find Full Text PDFThe retrograde P-wave theory: explaining ST segment depression in supraventricular tachycardia by retrograde AV node conduction.
Pacing Clin Electrophysiol
September 2014
Division of Cardiology, Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Canada.
Background: Pseudo ischemic ST segment changes during supraventricular tachycardia (SVT) are not yet fully understood. Our aim was to determine whether venticulo-atrial (VA) conduction during SVT may be a possible mechanism for ST depression (STd) in SVT.
Methods: Patients undergoing SVT ablation (2010-2012) were analyzed (n = 72).
Computerized vectorcardiography telemetry: a new device for continuous multilead ST-segment monitoring of ambulatory patients. A preliminary report.
Ann Noninvasive Electrocardiol
July 2002
Department of Medicine and Cardiology A, Aarhus University Hospital, Denmark.
Background: Continuous vectorcardiography ST-segment monitoring has become a well-established method in the surveillance of patients with acute myocardial ischemia. However, immobility of the vectorcardiography technique prevents monitoring of patients during ambulatory activities. Computerized vectorcardiography telemetry (CVT) with the capacity of real-time ST-segment analysis has been developed in an attempt to overcome this shortcoming.
View Article and Find Full Text PDFPositional changes of spatial QRS- and ST-segment variables in normal subjects: implications for continuous vectorcardiography monitoring during myocardial ischemia.
J Electrocardiol
January 2000
Department of Medicine and Cardiology, Aarhus University Hospital, Denmark.
Electrocardiographic QRS- and ST-segment changes are to be expected during changes in body posture. We prospectively analyzed the influence of changes in body position on continuous vectorcardiography monitoring of QRS-vector difference (QRS-VD) and ST change-vector magnitude (STC-VM) according to the currently used criteria of myocardial ischemia in 21 normal subjects. Fifteen (71%) and 6 (29%) subjects had significant positional QRS-VD and STC-VM changes, respectively.
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