Reduced combined ventricular output and increased oxygen extraction fraction in a fetus with complete heart block demonstrated by MRI

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Reduced combined ventricular output and increased oxygen extraction fraction in a fetus with complete heart block demonstrated by MRI

Meng Yuan Zhu, MS, Edgar Jaeggi, MD, Christopher W. Roy, MSc, Christopher K. Macgowan, PhD, Mike Seed, MBBS From the Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada, Division of Cardiology, Hospital for Sick Children, Toronto, Ontario, Canada, and Department of Physiology and Experimental Medicine, Hospital for Sick Children, University of Toronto, Toronto, Ontario...

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Combined ventricular output and oxygen delivery are reduced while oxygen extraction fraction is increased in fetuses with Ebstein's Anomaly by MRI

Results We studied 30 normal and 8 EA fetuses at 36 weeks gestation. There were 2 deaths in the 4 patients that underwent surgery (all Starnes procedures). We found reduced flows in all measured vessels except ascending aorta (Table 1). There were also significant reduced T2s in ascending aorta and superior vena cava, but no difference in umbilical vein (UV) and descending aorta (Table 1). DO2 ...

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Cardiac Output as a Function of Ventricular Rate in a Patient with Complete Heart Block.

THE physician occasionally encounters a situation in clinical practice that offers unique opportunities to study physiologic principles relating to cardiac function that cannot be evaluated under ordinary circumstances. We recently studied a patient who had developed complete heart block without evidence of other cardiac or systemic disease. With heart rate controlled by an external pacemaker, ...

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Complete heart block and itchy rash in a patient with COVID-19

Background: The outbreak of coronavirus disease 2019 (COVID-19) has become a global crisis, as the World Health Organization (WHO) declared COVID-19 as a global pandemic. Complete heart block, resulting from an abnormal heart rhythm, is a rare presentation of this infection, which can be life-threatening due to possible progression into ventricular tachycardia. Case Presentation: We report a c...

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Hyperkalemia-induced complete heart block

Background: Potassium, as an extracellular ion, plays an important role in the electrophysiologic function of the myocardium and any change in extracellular concentration of this ion might have a marked impression upon myocyte electrophysiologic gain. High serum potassium levels are thought to impair pulse conduction in Purkinje fibers and ventricles more than that in the Atrio...

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ژورنال

عنوان ژورنال: HeartRhythm Case Reports

سال: 2016

ISSN: 2214-0271

DOI: 10.1016/j.hrcr.2015.12.010