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Exploring cardiac vector propagation in acute myocardial infarction: a spatial velocity perspective.
Future Cardiol
January 2025
Department of Physiology, Institute of Postgraduate Medical Education & Research-SSKM Hospital, Kolkata, India.
Aims: To objectively characterize the spatial-velocity dynamics of the QRS-loop in the vectorcardiogram (VCG) of patients with acute myocardial infarction (AMI).
Methods: VCG was constructed as a space curve directly with three quasi-orthogonal leads I, aVF and V2 recorded by conventional ECG of 25 healthy individuals and 50 AMI patients. Spatial velocity (SV) of the dynamic QRS loop, spatial distance (SD), and spatial magnitude (SM) were recorded, along with axis-specific component attributes of vector magnitude such as ΔX, ΔY, and ΔZ.
Vectorcardiography Predicts Heart Failure in Patients Following ST Elevation Myocardial Infarction.
Ann Noninvasive Electrocardiol
September 2024
Department of Internal Medicine-Division of Hospital Medicine, University of Michigan, Ann Arbor, Michigan, USA.
Background: Modeling outcomes, such as onset of heart failure (HF) or mortality, in patients following ST elevation myocardial infarction (STEMI) is challenging but clinically very useful. The acute insult following a myocardial infarction and chronic degeneration seen in HF involve a similar process where a loss of cardiomyocytes and abnormal remodeling lead to pump failure. This process may alter the strength and direction of the heart's net depolarization signal.
View Article and Find Full Text PDFThe aim was to investigate the vector-cardiographic effects in patients submitted to dental extraction under local anesthesia. Twenty-one patients aged 36.6 ± 12.
View Article and Find Full Text PDFVectorcardiography signs of a failing Fontan: Heart rate, PR interval, RtQRSvm, QRSvm and SPQRS-T angle as noninvasive markers of late Fontan complications and mortality.
J Electrocardiol
August 2024
Department of Pediatrics, University of California at Davis Health, Sacramento, CA, United States of America; Division of Pediatric Cardiology, University of California at Davis Health, Sacramento, CA, United States of America. Electronic address:
Background: Limited data exists on interpreting vectorcardiography (VCG) parameters in the Fontan population.
Objective: The purpose of this study was to demonstrate the associations between ECG/VCG parameters and Fontan failure (FF).
Methods/results: 107 patients with a Fontan operation after 1990 and without significant ventricular pacing were included.
The spatial ventricular gradient is associated with inducibility of ventricular arrhythmias during electrophysiology study.
Heart Rhythm
November 2024
Harvard-Thorndike Arrhythmia Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts. Electronic address:
Background: Myocardial electrical heterogeneity is critical for normal cardiac electromechanical function, but abnormal or excessive electrical heterogeneity is proarrhythmic. The spatial ventricular gradient (SVG), a vectorcardiographic measure of electrical heterogeneity, has been associated with arrhythmic events during long-term follow-up, but its relationship with short-term inducibility of ventricular arrhythmias (VAs) is unclear.
Objective: This study was designed to determine associations between SVG and inducible VAs during electrophysiology study.
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