European Heart Journal Advance Access originally published online on March 6, 2007
European Heart Journal 2007 28(7):842-849; doi:10.1093/eurheartj/ehl534
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A novel echocardiographic predictor of in-hospital mortality and mid-term haemodynamic improvement after pulmonary endarterectomy for chronic thrombo-embolic pulmonary hypertension
1 Department of Clinical and Experimental Cardiology, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
2 Department of Pulmonology, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
3 Department of Cardiology, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
4 Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
5 Department of Cardiothoracic Surgery, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
Received 19 July 2006; revised 23 November 2006; accepted 18 January 2007; online publish-ahead-of-print 6 March 2007.
* Corresponding author. Tel: +31 20 5663264; fax: +31 20 6975458. E-mail address: h.l.tan{at}amc.uva.nl
See page 785 for the editorial comment on this article (doi:10.1093/eurheartj/ehm040)
Aims: To study whether pre-operative assessment, using echocardiography, of the timing of a particular feature in the pulmonary flow (pulmonary flow systolic notch) may predict in-hospital mortality and mid-term haemodynamic improvement after pulmonary endarterectomy (PEA) for chronic thrombo-embolic pulmonary hypertension (CTEPH).
Methods and results: Fifty-eight of 61 consecutive CTEPH patients (aged 53 ± 14 years; 36 women) who underwent PEA between June 2002 and June 2005 were studied. Clinical, haemodynamic, and echocardiographic variables were assessed pre-operatively and at 3 months post-PEA. Timing of the notch was expressed as notch ratio (NR). Pre-operatively, seven patients had no notch, 33 had NR < 1.0, and 18 had NR > 1.0. NR was associated with in-hospital mortality (P < 0.01). Moreover, multivariable analysis revealed that among pre-operative variables, NR was an independent predictor of residual-increased pulmonary artery systolic pressure (>40 mmHg) at 3 months post-PEA (P = 0.01). Receiver operator characteristic analysis established NR = 1.0 as optimal cutoff to distinguish patients at risk of such unfavourable outcomes, with NR > 1.0 conferring higher risk.
Conclusion: NR is related with in-hospital mortality and residual pulmonary hypertension after PEA. NR > 1.0 is associated with a higher risk of such unfavourable outcomes. NR may be considered a determinant of eligibility for PEA.
Key Words: Chronic thrombo-embolic pulmonary hypertension • Echocardiography • Pulmonary endarterectomy • Outcome
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