Left ventricular function can be evaluated by qualitative grading and by eyeball estimation of
ejection fraction (EF). We sought to define the reproducibility of these techniques, and how …

Background The test–retest reliability for multiple cardiopulmonary exercise test (CPX)
variables has not been compared in a single study and the influence of different diseases on …

Tissue Doppler imaging is an essential echocardiographic technique for the non-invasive
assessment of myocardial blood velocity. Image acquisition and interpretation are performed …

Objective—Aortic reservoir pressure indices independently predict cardiovascular events
and mortality. Despite this, there has never been a study in humans to determine whether …

Background Correctly selecting the end‐diastolic and end‐systolic frames on a 2D
echocardiogram is important and challenging, for both human experts and automated …

In clinical practice, echocardiographers are often unkeen to make the significant time
investment to make additional multiple measurements of Doppler velocity. Main hurdle to …

Aims Measurements with superior reproducibility are useful clinically and research
purposes. Previous reproducibility studies of Doppler assessment of aortic stenosis (AS) …

Background Variability has been described between different echo machines and different
modalities when measuring tissue velocities. We assessed the consistency of tissue velocity …

Current guidelines for measuring cardiac function by tissue Doppler recommend using
multiple beats, but this has a time cost for human operators. We present an open-source …

Background Cardiopulmonary exercise testing allows for assessment of cardiac and
respiratory limitation, but is often affected by patient effort. Indices of oxygen kinetics …