The Effectiveness of Combination Antihypertensive Therapy in Women With Hypothyroidism and the Metabolic Syndrome

Abstract

Evaluating the effectiveness of the various options of combination antihypertensive therapy (AHT) in women with arterial hypertension (AH) and metabolic syndrome (MS) and hypothyroidism. The study included 163 women with hypertension, metabolic syndrome, and hypothyroidism, the median age of 53.5 (48-60) years; in 73 (44.8%) women were diagnosed with subclinical hypothyroidism (SH), 90 (55.2%) - overt hypothyroidism (OH). Patients with both SH and OH, depending on the source of the heart rate (HR) was appointed as one of the following combination of AHT. If heart rate <75 beats/min, patients (n=100) received a combination of the dihydropyridine calcium antagonist (AA) amlodipine 5 mg/day, and angiotensin receptor blockers II (ARB) losartan 50 mg/day, with heart rate >75 beats/min (n=63) - a combination of amlodipine 5 mg/day and imidazoline receptor agonist (IRA) moxonidine 200 micrograms/day. The failure to achieve target blood pressure (BP) after 4 weeks of dose drugs doubled with subsequent evaluation of the effectiveness even after 4 weeks. At baseline and after 6 months of therapy, all patients underwent daily blood pressure monitoring (DBPM). At 8 weeks, the use of a combination of AA+ARB target BP level was registered in 26 (59%) of 44 women with SH and 34 (60.7%) of the 56 - OH. In the group of women who took the AA+IRA, after 8 weeks of the target blood pressure was observed in 24 (82.8%) of 29 patients with SH and 28 (82.4%) of 34 - to OH. Register the target blood pressure was observed significantly more frequently (p<0,05) when using a combination of AA+IRA compared with AA+ARBs as with SH and OH. As a result of the combination of DBPM AA and ARBs in patients with SH and OG provided a significant reduction in average daily, daytime and nighttime systolic and diastolic blood pressure (SBP and DBP), the time index of SBP and DBP during the day and night hours. The therapy of AA and IRA regardless of the severity of hypothyroidism, there was a significant improvement in all indicators DBPM: average daily, daytime and nighttime SBP and DBP, time index and variability in SBP and DBP during the day and at night. Furthermore, as in the SH and OH significantly more pronounced positive changes most DBPM parameters were recorded using IRA in combination with AA compared with a combination AA+ARB. Significant increase in the number of women with optimal BP daily profile "dipper" observed only when using amlodipine and moxonidine. In women with hypertension, hypothyroidism and MS, regardless of the severity of decline of thyroid function and combination of the dihydropyridine AA IRA had an advantage over the AA combination with ARBs, since most patients provided achieving target blood pressure and clinically significant positive impact on BPM indicators. The results can be used in selecting the optimal AHT in patients with hypertension, MS, and the manifest subclinical hypothyroidism.