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Journal Article
Observational Study
Severe Covid-19 and acute pulmonary hypertension: 24-month follow-up regarding mortality and relationship to initial echocardiographic findings and biomarkers.
Acta Anaesthesiologica Scandinavica 2023 Februrary
INTRODUCTION: Critically ill Covid-19 patients are likely to develop the sequence of acute pulmonary hypertension (aPH), right ventricular strain, and eventually right ventricular failure due to currently known pathophysiology (endothelial inflammation plus thrombo-embolism) that promotes increased pulmonary vascular resistance and pulmonary artery pressure. Furthermore, an in-hospital trans-thoracic echocardiography (TTE) diagnosis of aPH is associated with a substantially increased risk of early mortality. The aim of this retrospective observational follow-up study was to explore the mortality during the 1-24-month period following the TTE diagnosis of aPH in the intensive care unit (ICU).
METHODS: A previously reported cohort of 67 ICU-treated Covid-19 patients underwent an electronic medical chart-based follow-up 24 months after the ICU TTE. Apart from the influence of aPH versus non-aPH on mortality, several TTE parameters were analyzed by the Kaplan-Meier survival plot technique (K-M). The influence of biomarkers for heart failure (NTproBNP) and myocardial injury (Troponin-T), taken at the time of the ICU TTE investigation, was analyzed using receiver-operator characteristics curve (ROC) analysis.
RESULTS: The overall mortality at the 24-month follow-up was 61.5% and 12.8% in group aPH and group non-aPH, respectively. An increased relative mortality risk continued to be present in aPH patients (14.3%) compared to non-aPH patients (5.6%) during the 1-24-month period. The easily determined parameter of a tricuspid valve regurgitation, allowing a measurement of a systolic pulmonary artery pressure (regardless of magnitude), was associated with a similar K-M outcome as the generally accepted diagnostic criteria for aPH (systolic pulmonary artery pressure >35 mmHg). The biomarker values of NTproBNP and Troponin-T at the time of the TTE did not result in any clinically useful ROC analysis data.
CONCLUSION: The mortality risk was increased up to 24 months after the initial examination in ICU-treated Covid-19 patients with a TTE diagnosis of aPH, compared to non-aPH patients. Certain individual TTE parameters were able to discriminate 24-month risk of morality.
METHODS: A previously reported cohort of 67 ICU-treated Covid-19 patients underwent an electronic medical chart-based follow-up 24 months after the ICU TTE. Apart from the influence of aPH versus non-aPH on mortality, several TTE parameters were analyzed by the Kaplan-Meier survival plot technique (K-M). The influence of biomarkers for heart failure (NTproBNP) and myocardial injury (Troponin-T), taken at the time of the ICU TTE investigation, was analyzed using receiver-operator characteristics curve (ROC) analysis.
RESULTS: The overall mortality at the 24-month follow-up was 61.5% and 12.8% in group aPH and group non-aPH, respectively. An increased relative mortality risk continued to be present in aPH patients (14.3%) compared to non-aPH patients (5.6%) during the 1-24-month period. The easily determined parameter of a tricuspid valve regurgitation, allowing a measurement of a systolic pulmonary artery pressure (regardless of magnitude), was associated with a similar K-M outcome as the generally accepted diagnostic criteria for aPH (systolic pulmonary artery pressure >35 mmHg). The biomarker values of NTproBNP and Troponin-T at the time of the TTE did not result in any clinically useful ROC analysis data.
CONCLUSION: The mortality risk was increased up to 24 months after the initial examination in ICU-treated Covid-19 patients with a TTE diagnosis of aPH, compared to non-aPH patients. Certain individual TTE parameters were able to discriminate 24-month risk of morality.
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