Violin plots consisting of cell numbers of ten or fewer are not shown and are labelled as ‘NA’ in those cases. Reporting summary Further information on research design is available in the Nature Portfolio Reporting Summary linked to this article....
The heart fills with blood from the lungs and body when the AV valves are open. When the heart pumps or contracts, the AV valves close and prevent the blood from regurgitating backwards. The semilunar valves open when the heart pumps allowing the blood to flow into the aorta and main ...
Using a brightfield synchronisation source also has other potential uses such as fusing and phase-registering multiple fluorescence channels with sparsely labelled (and less clearly periodic) structures39, or acquiring synchronised images in multi-acquisition modalities such as structured illumination ...
For each of these beats, we also label the regions they are associated with. The dark circle lines are the reference heart rates. As shown, the heartbeats labelled region two coincide with the reference heart rates, as expected. However, heartbeats labelled with other regions (1,3,4,5,7,...
The first heart sound (systolic) is associated with the closure of the bicuspid and tricuspid valves at the beginning of the systole, and S1 corresponds to the peak of the R wave in the ECG signal. However, the second heart sound (S2) (diastolic) is generated by the closure of the ...
The activity of the heart is connected with the creation of a large number of characteristic sounds. These sounds occur due to changes in the velocity (or the character) of the blood flow and closing or opening of the respective valves. Hence, this is a diagnostic method that is based on...