"Prognosis Among Healthy Individuals Discharged With a Primary Diagnosis of Syncope"  
JACC Jan 2013 
http://content.onlinejacc.org/article.aspx?articleid=1484452
"Conclusions  The first admission for syncope among healthy individuals significantly predicts the risk of all-cause mortality, stroke, cardiovascular hospitalization, device implantation, and recurrent syncope."

"Risk Stratification and Outcome of Patients With Hypertrophic Cardiomyopathy ≥60 Years of Age"  Circ Feb 5 
http://circ.ahajournals.org/content/127/5/585.abstract