Relationship among long-term aircraft noise exposure, blood pressure profile, and arterial stiffness.

OBJECTIVE: To assess the impact of long-term exposure to aircraft noise on blood pressure (BP), prevalence of arterial hypertension, and indices of asymptomatic organ damage.

METHODS: Using acoustic maps, we selected and further compared people living (average 35 years) in areas exposed to high, more than 60 dB (n = 101), and low aircraft noise, less than 55 dB (n = 100). Medical history taking, office BP measurement, ambulatory BP monitoring, and echocardiographic and arterial stiffness measurements were performed.

RESULTS: Exposure to aircraft noise did not increase the prevalence of arterial hypertension (50%, both groups) but was associated with higher office (88.3 ± 11.4 vs. 79.8 ± 8.6 mmHg, P < 0.001) and night-time DBP (66.6 ± 9.5 vs. 63.6 ± 7.3 mmHg, P < 0.01). Participants exposed to a high aircraft noise level had a higher carotid-femoral pulse wave velocity (PWV) (10.3 ± 1.8 vs. 9.4 ± 1.4 m/s, P < 0.01) and lower early mitral annulus velocity (e') (8.4 ± 2.9 vs. 9.2 ± 3.4 cm/s, P = 0.047). These differences were independent of age, sex, BMI, education, time spent at home, smoking status, alcohol consumption, and antihypertensive treatment. Higher office and night-time DBP, PWV, and e' values were explicitly observed in exposed normotensive participants. PWV in aircraft noise-exposed normotensive participants was equal to that of two decades older unexposed normotensive participants and was significantly associated with noise annoyance.

CONCLUSION: Long-term aircraft noise exposure is related to higher office and night-time DBP, more advanced arterial stiffness, and unfavourable left ventricle diastolic function changes. Accelerated arterial stiffening was observed in those exposed to aircraft noise, even normotensive participants, to a degree depending on noise annoyance.