|   Medical history/cardiovascular risk factors  |       Number  |       %  |    
|   Heart failure  |       27  |       16.7  |    
|   Hypertension  |       95  |       67.4  |    
|   Diabetes  |       26  |       18.4  |    
|   Tobacco smoking  |       16  |       11.4  |    
|   Dyslipidemia  |       4  |       2.8  |