Key result
In a single aged male with hypertension, the frequency of interarm blood pressure differences >10 mmHg was 30% during periods with medication versus 41% during periods without medication.
Why the study?
The common observation that individuals tend to have higher systolic blood pressure in the right arm than the left arm lacked confirmation from prolonged individual measurements.
Does antihypertensive medication influence the frequency of clinically relevant interarm blood pressure differences in an aged male with hypertension?
Case Report (n=1)
No
Does antihypertensive medication influence the frequency of clinically relevant interarm blood pressure differences in an aged male with hypertension?
Answers are grounded in this paper and cite their sources.
In a single-subject, year-long observational study, clinically relevant interarm blood pressure differences were common but occurred less frequently during periods of medication use.
Both the left- and the right-arm blood pressure of an aged male suffering from hypertension were measured daily for a full year. The measurements were performed three times per day, in the morning, the afternoon, and the evening. During the year of measurements, 9 medication-dependent phases are distinguished. The 2196 sets of measurement data could be compared with the results of a 5-week period with similar measurements of the same individual, almost a year after the end of the first, full-year measuring period. The influence of the medication is significant, and most probably strongly patient-dependent. The common experience that the individuals of the investigated groups tend to show more frequently a higher SBP in the right arm than in the left arm is now, for the first time, confirmed for an individual who was investigated over a prolonged period. His interarm differences (IAD) appeared to show no detectable correlation with the SBP or DBP, and the absolute value of the IAD ranged mostly from -15 (R>L) to +15 (R10 mmHg) is much lower (30%) during periods with medication than during periods without medication (41%).
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Loon et al. (2026) conducted a case report in Hypertension (n=1). Antihypertensive medication vs. Periods without medication was evaluated on Interarm differences (IAD) >10 mmHg. In a single aged male with hypertension, the frequency of interarm blood pressure differences >10 mmHg was 30% during periods with medication versus 41% during periods without medication.
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