The syncope that most concerns healthcare professionals is cardiac syncope, blacking out due to an underlying heart disease such as a heart rhythm abnormality, or arrhythmia, he explains.

The syncope that most concerns healthcare professionals is cardiac syncope, blacking out due to an underlying heart disease such as a heart rhythm abnormality, or arrhythmia, he explains.

He argued that a tilt test is not necessarily required, "because even people with severe cardiac syncope can have a positive tilt test." "What this patient needs is a good doctor.

The syncope that most concerns healthcare professionals is cardiac syncope, blacking out due to an underlying heart disease such as a heart rhythm abnormality, or arrhythmia, he explains.

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Cardiac syncope is blacking out due to an underlying heart disease, such as a heart rhythm abnormality, explained Elijah Behr, M.D., a cardiologist at Mayo Clinic Healthcare in London.