oa Cardiovascular Journal of Africa - A comparison of heart rate variability in affected and unaffected members of families with progressive familial heart block type I



The presence of sinus bradycardia (less than 6O/min) in patients affected by progressive familial heart block type I (PFHB1) and their inability to reach a target heart rate during exercise testing, prompted an investigation of the influence of the autonomic nervous system on cardiac conduction in these family members.


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