This waveform and recording display the findings associated with a 3-component pericardial friction rub. The three components are described as the early diastolic, late diastolic, and systolic components. Often the diastolic components can obscure S1. The sounds heard are typically described as scratchy, and occur due to the inflamed pericardium rubbing against the heart Learn more at https://www.ekohealth.com/blogs/education