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A young man was admitted for recurrence of acute myeloblastic leukaemia. On examination, blood pressure was 120/78 mm Hg. Cardiac auscultation revealed a soft precordial continuous murmur with normal P2. ECG revealed non-specific intraventricular block. A transthoracic echocardiogram (TTE) demonstrated normal chamber size with mild global left ventricular hypokinesis (ejection fraction (EF) 52%). On apical four-chamber view with colour Doppler, low velocity flow was demonstrated across the interventricular septum (online supplemental video 1). Parasternal short-axis colour Doppler documented abnormal systolic retrograde flow (toward the transducer) into the main pulmonary artery (MPA). Pulse Doppler located just distal to the pulmonary valve revealed that both the systolic and diastolic blood flow were …
Contributors SW prepared the first draft. HY and DP reviewed and edited the final manuscript. All authors are responsible for the overall content.
Funding This study was funded by National Natural Science Foundation of China (grant no: 81600359).
Competing interests None declared.
Patient and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting, or dissemination plans of this research.
Patient consent for publication Not required.
Provenance and peer review Not commissioned; externally peer reviewed.
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