This study aims to assess the application of the novel IMPULSE algorithm for the detection of pulmonary hypertension (PH) in those with a low or intermediate probability of PH according to the British Society of Echocardiography (ESC) and European Society of Cardiology (ESC) guidelines.
This is a prospective, multi-centre cross-sectional study with a planned 18 month longitudinal component. Participants will be recruited from patients referred for the first time for transthoracic echocardiography at the Royal United Hospitals Bath National Health Service (NHS) Foundation Trust, Royal Free Hospital NHS Foundation Trust, Sheffield Teaching Hospitals, Royal Papworth Hospital, and Golden Jubilee Hospital. The investigators will prospectively recruit patients without a diagnosis of Pulmonary Hypertension. Transthoracic echocardiographic (TTE) imaging will be performed in line with British Society of Echocardiography minimum dataset guidelines, and comprehensive right heart echocardiographic imaging and analysis will be performed following the British Society of Echocardiography recommendations for assessing right heart function, in addition to the IMPULSE algorithm; A right ventricular free wall longitudinal strain value of less than -23%, or, right ventricular fractional area change (FAC) less than 35% in females/30% in males, in addition to a right ventricular isovolumetric relaxation time in excess of 73ms in patients with low/Intermediate probability of PH by current guidelines would categorise that patient as being IMPULSE positive.
Study Type
OBSERVATIONAL
Enrollment
200
A painless ultrasound scan of the heart.
Royal United Hospital NHS Foundation Trust
Bath, Banes, United Kingdom
Golden Jubilee Hospital
Glasgow, Lanarkshire, United Kingdom
Sheffield Teaching Hospitals NHS Foundation Trust
Sheffield, South Yorkshire, United Kingdom
Royal Papworth Hospital
Cambridge, United Kingdom
Analysis of the IMPULSE algorithm in the assessment of pulmonary hypertension
Analyse sensitivity, specificity, positive predictive value, negative predictive value, accuracy of IMPULSE algorithm on the assessment of PH.
Time frame: 18 months
Analysis of the IMPULSE algorithm in comparison to existing guidlines
Analyse sensitivity, specificity, positive predictive value, negative predictive value, accuracy of IMPULSE algorithm in comparison with the existing ESC PH guidelines.
Time frame: 18 months
Analysis of additional echocardiographic measurements of right heart systolic function not utilised in the assessment of pulmonary hypertension.
Values from echocardiographic measures of right heart systolic function not currently used in the ESC/BSE echocardiography pulmonary hypertension, or IMPULSE algorithms will be analysed for sensitivity, specificity, positive predictive value and negative predictive value in context with with values obtained during formal pulmonary hypertension diagnosis via right heart catheter, in patients already found to have a mild to intermediate probability of pulmonary hypertension.
Time frame: 18 months
Analysis of additional echocardiographic measurements of right heart diastolic function not utilised in the assessment of pulmonary hypertension.
Values from echocardiographic measures of right heart diastolic function not currently used in the ESC/BSE echocardiography pulmonary hypertension, or IMPULSE algorithms will be analysed for sensitivity, specificity, positive predictive value and negative predictive value in context with with values obtained during formal pulmonary hypertension diagnosis via right heart catheter, in patients already found to have a mild to intermediate probability of pulmonary hypertension.
Time frame: 18 months
Analysis of additional echocardiographic measurements of left heart function not utilised in the assessment of pulmonary hypertension.
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Royal Free NHS Foundation Trust
London, United Kingdom
Values obtained in the echocardiographic assessment of left heart disease not currently used in the ESC/BSE echocardiography pulmonary hypertension, or IMPULSE algorithms will be analysed for sensitivity, specificity, positive predictive value and negative predictive value in context with values obtained during formal pulmonary hypertension diagnosis via right heart catheter, in patients already found to have a mild to intermediate probability of pulmonary hypertension.
Time frame: 18 months