Receiver operator curves for plasma 5HIAA and NT-proBNP with area under curves (AUC) and 95% confidence intervals presented.

<p>Receiver operator curves for plasma 5HIAA and NT-proBNP with area under curves (AUC) and 95% confidence intervals presented.</p

Diagnostic accuracy of NT-proBNP & plasma 5HIAA.

<p>LR+ Positive likelihood ratio.</p><p>LR− Negative likelihood ratio.</p

Bland Altman plot demonstrating degree of inter-observer agreement in assigning echocardiographic scores.

<p>Bland Altman plot demonstrating degree of inter-observer agreement in assigning echocardiographic scores.</p

Scatter diagram demonstrating correlations of NT-proBNP and plasma 5HIAA with the echocardiographic score.

<p>Scatter diagram demonstrating correlations of NT-proBNP and plasma 5HIAA with the echocardiographic score.</p

Box plots demonstrating spread of results for all 5 biomarkers.

<p>Box plots demonstrating spread of results for all 5 biomarkers.</p