Effects of thoracic epidural analgesia on exercise-induced myocardial ischaemia in refractory angina pectoris.

Abstract:

BACKGROUND:Thoracic epidural analgesia (TEDA) was offered to patients with refractory angina pectoris. Our primary objectives were to evaluate TEDAs´ influence on quality of life (QoL, base for power analysis), and hypothesising that TEDA with bupivacaine during 1 month counteracts exercise-induced myocardial hypoperfusion and increase physical performance. METHODS:Patients with refractory angina and exercise inducible hypoperfusion, as demonstrated by myocardial perfusion imaging (MPI), were randomised to 1-month treatment with TEDA with bupivacaine (B-group, n = 9) or saline (P-group, n = 10) in a double-blind fashion. MPI and bicycle ergometry were performed before TEDA and after 1 month while subjective QoL on a visual analogue scale (VAS) reported by the patients was checked weekly. RESULTS:During this month VAS (mean [95%CI]) increased similarly in both groups (B-group from 33 [18-50] to 54 [30-78] P < 0.05; P-group from 40 [19-61] to 48 [25-70] P < 0.05). The B-group reduced their exertional-induced myocardial hypoperfusion (from 32% [12-52] to 21% [3-39]; n = 9; P < 0.05), while the P-group showed no significant change (before 21% [6-35]; at 1 month 23% [6-40]; n = 10). MPI at rest did not change and no improvement in physical performance was detected in neither of the groups. CONCLUSIONS:In refractory angina, TEDA with bupivacaine inhibits myocardial ischaemia in contrast to TEDA with saline. Regardless of whether bupivacaine or saline is applied intermittently every day, TEDA during 1 month improves the quality of life and reduces angina, even when physical performance remains low. A significant placebo effect has to be considered.

authors

Gonon A,Richter A,Cederholm I,Khan J,Novak J,Milovanovic M,Janerot-Sjoberg B

doi

10.1111/aas.13291

subject

Has Abstract

pub_date

2019-04-01 00:00:00

pages

515-522

issue

4

eissn

0001-5172

issn

1399-6576

journal_volume

63

pub_type

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