NOS3 and atrial fibrillation: Some genes that were only associated with heart rate increase during exercise were found to be associated with resting heart rate and heart rate variability (PPIL1), blood pressure (ADRB1, ACE, NOS3, and HMGA2), atrial fibrillation (MCTP2 and NOS3), exercise treadmill test and lung function (both RYR2).