FGF23 and left ventricular hypertrophy: Clinically, elevated FGF23 has been associated with an increased risk of major cardiovascular events and mortality [14, 15, 16], and in vitro has been shown to induce pathological hypertrophy of isolated cardiomyocytes in the absence of α‐klotho, producing left ventricular hypertrophy in a murine model following intraventricular or intravenous FGF23 injection [17].