Serum uric acid (SUA) is a routine investigation in hypertensive patients. Prolonged ECG QT intervals are associated with an increased sudden cardiac death risk. The present study aimed to assess the relationship between serum uric acid, and blood pressure and QT interval, respectively. A total of 56 patients with optimal, normal and high normal blood pressure were included in the present retrospective study. ECG QT interval durations, systolic and diastolic blood pressures (SBP, DBP) and SUA level were available for each participant from medical records. Pulse pressure (PP) and mean arterial pressure (MAP) were calculated. Patients were divided into two groups according to SUA level. The first group comprised 31 patients with SUA up to 5 mg/dl, the second group, 25 patients with SUA ≥ 5 mg/dl. Serum uric acid levels were: 3.74±0.78 mg/dl and 6.15±1.43 mg/dl (p<0.01) in the first and the second group, respectively. High normal blood pressure was more prevalent in the second group compared to the first (35% and 48%, respectively). Heart rate corrected QT intervals (QTc) were significantly longer in the second group compared to the first (400±21 ms and 420±36 ms, respectively, p=0.016). Patients of the second group were, also, more likely to have SBP>130 mmHg, DBP>85 mmHg, PP≥60 mmHg, MAP≥105 mmHg and QTc≥450ms compared to those of the first group. Significant correlations and associations were found between SUA and high normal blood pressure and prolonged QT intervals, respectively. Receiver-operating characteristic curve analysis identified cut-off values for SUA of 5.22, 5.48, 3.9, 5.23 and 5.45 mg/dl in predicting prolonged QTc, high normal blood pressure, increased systolic, diastolic and mean arterial pressure, respectively. High normal blood pressure and mean arterial pressure, wide pulse pressure and prolonged QT intervals are very likely in patients with high normal and elevated SUA levels. Serum uric acid should be monitored in patients with normal and high normal blood pressure, and blood pressure and QT interval should be measured in patients with SUA ≥ 5 mg/dl.