Heart urchins (spatangoids) and their relatives (holasteroids, disasteroids) have a bilaterally symmetrical test composed of ten double columns of plates, five interambulacral columns (labelled 1-5) ...

We use a variety of genetic and imaging techniques in zebrafish to link cellular processes/signalling, extracellular matrix composition, and heart morphology and function. These include establishing ...

Examine the morphology of the QRS complex to see if ... originate in the ventricles but have a heart rate less than 100 bpm. These rhythms — called “idioventricular rhythms” — are ...