Vectorcardiographic ST deviations related to increased heart rate in the absence of ischemia in an experimental pig model

Häggmark, Sören; Haney, Michael; Johansson, Gillis; Biber, Björn; Näslund, Ulf

doi:10.1016/j.jelectrocard.2005.08.014

Cited by 3 publications

(1 citation statement)

References 18 publications

(22 reference statements)

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“…Although there may be an interaction between HR and ischemia concerning effects on ST levels, there was no way to separate these components in ischemic subjects with this study design, other than to compare them with non‐ischemic subjects at the same HR. These results also confirmed previous work concerning ST behavior during HR increases in non‐ischemic conditions (4, 22). While the VCG methodology was chosen because of its strengths as a scientific measurement and analysis instrument, these results examine the same ST phenomena reflected by 12‐lead ECG in the multiple single‐lead planar format, although we have not attempted a comparison of VCG and 12‐lead ECG ST analysis.…”

Section: Discussionsupporting

confidence: 92%

Contributions of myocardial ischemia and heart rate to ST segment changes in patients with or without coronary artery disease

Häggmark¹,

Haney

Johansson

et al. 2007

Acta Anaesthesiol Scand

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Background: ST changes related to ischemia at different heart rates (HRs) have not been well described. We aimed to analyze ST dynamic changes by vectorcardiography (VCG) during pacing-induced HR changes for subjects with proven coronary artery disease (CAD) and without (non-CAD). Methods: Symptomatic CAD patients scheduled for elective surgery were enrolled along with a non-CAD group. During anesthesia, both groups were placed at multiple ascending levels. VCG ST data, and in particular in ST change vector magnitude (STC-VM) from baseline, along with arterial and great coronary artery vein (GCV) blood samples were collected to determine regional myocardial lactate production. Results: A total of 35 CAD and 10 non-CAD patients were studied over six incremental 10 beat/min HR increases. STC-VM mean levels increased in the CAD group from 9 AE 5 to 131 AE 37 mV (standard deviation) compared with non-CAD subjects with 8 AE 3-76 AE 34 mV. Myocardial

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Section: Discussionsupporting

confidence: 92%

Contributions of myocardial ischemia and heart rate to ST segment changes in patients with or without coronary artery disease

Häggmark¹,

Haney

Johansson

et al. 2007

Acta Anaesthesiol Scand

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Vectorcardiogram synthesized from the 12-lead electrocardiogram to image ischemia

Strauss

Olson²,

et al. 2009

Journal of Electrocardiology

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Heart Rate Variability Analysis of Ischemic and Heart Rate Related ST-segment Deviation Episodes Based on Time-frequency Method

Wang

Sun

et al. 2007

2007 Joint Meeting of the 6th International Symposium on Noninvasive Functional Source Imaging of the Brain and Heart and the I

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Background: ST-segment deviation is the routine manifestations in the ST segment [1 ,2]. In this study, a different method for the diagnosis of coronary heart diseases. However, method, based on time-frequency analysis of heart rate other phenomena, such as heart rate changes and a posture variability (HRV), was proposed to evaluate the possibility of change can cause similar manifestations in the ST segment, lowing detecting the existence of ST-segment deviation episodes and the sensitivity and specificity of the detection. In this study, a the classification of them.* Corresponding author 1-4244-0949-7/07/$25.00 ©C2007 IEEE.

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Vectorcardiographic ST deviations related to increased heart rate in the absence of ischemia in an experimental pig model

Abstract: The electrocardiographic ST segment may change when heart rate (HR)

Cited by 3 publications

References 18 publications

Contributions of myocardial ischemia and heart rate to ST segment changes in patients with or without coronary artery disease

Contributions of myocardial ischemia and heart rate to ST segment changes in patients with or without coronary artery disease

Vectorcardiogram synthesized from the 12-lead electrocardiogram to image ischemia

Heart Rate Variability Analysis of Ischemic and Heart Rate Related ST-segment Deviation Episodes Based on Time-frequency Method

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