Abstract
Shock is a state of circulatory dysfunction and its diagnosis is complex in neonates. Hemodynamic assessment using echocardiography has potential to guide better management regimes in neonates with shock. Objective of this study is to analyze changes in the echocardiographic parameters in preterm neonates with shock at presentation and after resolution. In this prospective pragmatic Cohort study, eligible neonates with shock were monitored for changes in echocardiographic parameters at onset of shock and after resolution of shock. Paired data analysis was done for observed changes in the parameters. Based on initial clinical parameters and echocardiographic parameters, infants were assigned into different types of shock. Data of 37 infants were analyzed for baseline clinical and echocardiographic parameters, and data of 31 infants were analyzed for the changes in the observed parameters after shock resolution. Statistically significant changes were observed in inferior vena cava collapsibility index (ICI), left ventricular end diastolic volume (LVEDV), isovolemic ventricular relaxation time (IVRT), left and right ventricular stroke volume, and ejection fraction (EF). There was no agreement between clinical and echocardiographic definitions of shock.
Conclusion: We noticed shock has overlapping pathophysiologic features. Our study highlights the importance of baseline documentation of echocardiographic parameters of all infants who are at risk of shock and repeat echocardiography at onset of shock to observe the changes in ICI, LVEDV, IVRT, stroke volume, and EF. This would guide pathophysiological management of shock in neonates.
What is Known: • In neonates pathophysiology of shock is overlapping. • Echocardiography can help in better understanding and management of shock. | |
What is New: • Study gives median changes in major echocardiographic parameters in neonatal shock. • These changes can guide for selection of volume and inotropes in management. |
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Abbreviations
- CRT:
-
Capillary refilling time
- EF:
-
Ejection fraction
- EF1:
-
EF at shock
- EF2:
-
After resolution of shock
- E/A ratio:
-
Mitral valve E wave to A wave ratio
- HR:
-
Heart rate
- ICI:
-
Inferior vena cava collapsibility index
- ICI1:
-
ICI at shock
- ICI2 :
-
ICI after resolution of shock
- IVC:
-
Inferior vena cava
- IVRT:
-
Isovolemic ventricular relaxation time
- IVRT1:
-
IVRT at shock
- IVRT2 :
-
IVRT after resolution of shock
- LSV:
-
Left ventricular stroke volume
- LSV1:
-
LSV at shock
- LSV2 :
-
LSV after resolution of shock
- LVEDV:
-
Left ventricular end diastolic volume
- LVEDV1:
-
LVEDV at shock
- LVEDV2:
-
LVEDV after resolution of shock
- LVO:
-
Left ventricular output
- MAP:
-
Mean arterial pressure
- NICU:
-
Neonatal intensive care unit
- RSV:
-
Right ventricular stroke volume
- RSV1:
-
RSV at shock
- RSV2 :
-
RSV after resolution of shock
- RVO:
-
Right ventricular output
- SVR:
-
Systemic vascular resistance
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Dr Dinesh Pawale was a Principal Investigator who collected all data, drafted initial manuscript and revised the manuscript. Dr Srinivas Murki conceptualised and designed study, critically reviewed the manuscript and approved the final version of manuscript. Dr Dattatray Kulkarni helped in data collection and manuscript writing. Dr Venkateshwarlu Vardhelli helped in identifying subjects and managment and anlysis of data. Dr Deepak Sharma helped in developing protocol and drafting initial manuscript. Dr Tejopratap Oleti helped in designing study, drafting initial protocol and reviewed final version of manuscript. Dr Sai Kiran coordinated data collection and data analysis and critically reviewed manucript. Dr Shweta Bakhru analysed all stored echocardiograhic data and reviewed final manuscript. Dr Nageswar Rao Koneti reviewed echocardiographic data, helped in drafting intitial manuscript and analysis of data.
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This article does not contain any studies with human participants or animals performed by any of the authors. Ethics approval obtained from the Institute’s Ethics Committee (Ec Ref No- 25_2017).
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Informed consent was obtained from all individual participants included in the study.
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Communicated by Daniele De Luca
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Pawale, D., Murki, S., Kulkarni, D. et al. Echocardiographic assessment of hemodynamic changes in preterm neonates with shock: a prospective pragmatic cohort study. Eur J Pediatr 179, 1893–1899 (2020). https://doi.org/10.1007/s00431-020-03775-5
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DOI: https://doi.org/10.1007/s00431-020-03775-5