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Figure 2
Visualization of cardiac rhythmic or other abnormalities, highlighted by arrows. Sinoatrial pauses were defined as the atrium ceasing to contract for > 3 × the median inter beat interval of the embryo. A sinoatrial arrest was defined as an event where the atrium stopped contracting for > 2 s. Abnormal cardiac morphology was defined as the atrium appearing as a tube-like structure, and impaired cardiac contractility was defined as the atrium vibrating rather than contracting.
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