Below is the graph of a quadratic function, showing where the function is increasing and decreasing. If we draw in the tangents to the curve, you will notice that if the gradient of the tangent is ...

Reduced kidney function may increase the risk for sudden cardiac ... each 10 mL/min/1.73 m 2 decrease in estimated glomerular filtration rate (eGFR) based on cystatin C measurements was ...

In the analysis of 16,769 community-dwelling individuals without atrial fibrillation, there was a step-wise increase in the risk of incident atrial fibrillation with decreasing kidney function.