(The following guest post is reprinted with permission from the blog of Dr John Mandola, an electrophysiologist in Louisville, KY.)
“No data is better than bad data…If you can’t see it, don’t call it,” Dr Feigenbaum often admonished us young fellows during the old Thursday Echo conference at IU.
Calling more than is actually there seems to be increasingly prevalent in this era of sensational, but often misleading medical headlines. Take the case of AF, AF ablation, and Dementia as the most recent example.
Atrial fibrillation remains one of the most common cardiac diagnosis, and dementia is one of Neurology’s most frequent diagnosis. Recently, as background, a study from a Utah group of electrophysiologists showed that AF predisposes to all forms of dementia, especially the specifically defined Alzheimer’s disease.
The study involved 37.000 patients, and was published in the prominent and well respected Heart Rhythm Journal. Although the mechanism is speculative, it comes as little surprise to those of us who care for AF patients that it could be associated with an increased risk of dementia. Excluding the very young, “lone AF” patient, this arrhythmia is–like dementia–a disease of birthdays, a disease of wear and tear. Associated conditions like high blood pressure, obesity, disordered sleep, sedentarism and diabetes all predispose to both dementia and AF.
However, the most recent headlines from this same group, suggesting that AF ablation may reduce the risk of dementia is troublesome. A prominent cardiac website had the AF ablation-dementia connection as its lead story most of the week.
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