BACKGROUND:Quantitative measures of the ventricular fibrillation (VF) electrocardiogram (ECG) have been correlated with the success of rescue shocks, making them ideal measures for guiding resuscitative interventions. Correlation of intramyocardial energy stores with the change in quantitative VF ECG measures would provide mechanistic insight into their utility. We sought to investigate the relationship between intramyocardial energy stores and four quantitative ECG measures. METHODS:Eighteen mixed-breed, domestic swine were sedated, anaesthetized and paralyzed. Swine were block randomized into three groups receiving 5, 10, or 15 min of untreated VF. Thoracotomy was performed and the heart was delivered. VF was induced by a 100 mA transthoracic shock while ECG was recorded. Biopsies of myocardial tissue were taken from the left and right ventricles after the prescribed duration of VF. Adenosine triphosphate (ATP) and adenosine diphosphate (ADP) concentrations in the tissue samples were measured. ECG data immediately prior to each biopsy were analyzed by each of four quantitative ECG methods: Scaling Exponent (ScE), Median Slope (MS), Amplitude Spectrum Area (AMSA), and logarithm of the Absolute Correlation (LAC). ATP and ADP concentrations of VF duration groups were compared. ATP and ADP concentrations were regressed against each quantitative ECG measure. RESULTS:ATP concentrations differed between VF duration groups, but ADP concentrations differed only between 5 and 10 min groups. A significant association existed between ATP and three quantitative measures--ScE, MS, and AMSA--but no significant relationship was found for ADP. CONCLUSION: Intramyocardial ATP levels correlate with quantitative measures of the ECG during ventricular fibrillation.
RCT Entities:
BACKGROUND: Quantitative measures of the ventricular fibrillation (VF) electrocardiogram (ECG) have been correlated with the success of rescue shocks, making them ideal measures for guiding resuscitative interventions. Correlation of intramyocardial energy stores with the change in quantitative VF ECG measures would provide mechanistic insight into their utility. We sought to investigate the relationship between intramyocardial energy stores and four quantitative ECG measures. METHODS: Eighteen mixed-breed, domestic swine were sedated, anaesthetized and paralyzed. Swine were block randomized into three groups receiving 5, 10, or 15 min of untreated VF. Thoracotomy was performed and the heart was delivered. VF was induced by a 100 mA transthoracic shock while ECG was recorded. Biopsies of myocardial tissue were taken from the left and right ventricles after the prescribed duration of VF. Adenosine triphosphate (ATP) and adenosine diphosphate (ADP) concentrations in the tissue samples were measured. ECG data immediately prior to each biopsy were analyzed by each of four quantitative ECG methods: Scaling Exponent (ScE), Median Slope (MS), Amplitude Spectrum Area (AMSA), and logarithm of the Absolute Correlation (LAC). ATP and ADP concentrations of VF duration groups were compared. ATP and ADP concentrations were regressed against each quantitative ECG measure. RESULTS:ATP concentrations differed between VF duration groups, but ADP concentrations differed only between 5 and 10 min groups. A significant association existed between ATP and three quantitative measures--ScE, MS, and AMSA--but no significant relationship was found for ADP. CONCLUSION: Intramyocardial ATP levels correlate with quantitative measures of the ECG during ventricular fibrillation.
Authors: Jason Coult; Jennifer Blackwood; Lawrence Sherman; Thomas D Rea; Peter J Kudenchuk; Heemun Kwok Journal: Circ Arrhythm Electrophysiol Date: 2019-01
Authors: Michiel Hulleman; David D Salcido; James J Menegazzi; Patrick C Souverein; Hanno L Tan; Marieke T Blom; Rudolph W Koster Journal: Resuscitation Date: 2017-08-24 Impact factor: 5.262
Authors: David D Salcido; Robert H Schmicker; Noah Kime; Jason E Buick; Sheldon Cheskes; Brian Grunau; Stephanie Zellner; Dana Zive; Tom P Aufderheide; Allison C Koller; Heather Herren; Jack Nuttall; Matthew L Sundermann; James J Menegazzi Journal: Resuscitation Date: 2018-05-24 Impact factor: 5.262
Authors: David D Salcido; Young-Min Kim; Lawrence D Sherman; Greggory Housler; Xiaoyi Teng; Eric S Logue; James J Menegazzi Journal: Resuscitation Date: 2011-10-01 Impact factor: 5.262
Authors: J Thannhauser; J Nas; R A Waalewijn; N van Royen; J L Bonnes; M A Brouwer; M J de Boer Journal: Neth Heart J Date: 2021-08-09 Impact factor: 2.854
Authors: Jos Thannhauser; Joris Nas; Priya Vart; Joep L R M Smeets; Menko-Jan de Boer; Niels van Royen; Judith L Bonnes; Marc A Brouwer Journal: Resusc Plus Date: 2021-04-02