Epicardial and microvascular coronary artery spasm in biopsy-proven viral myocarditis.
Acetylcholine
Coronary spasm
HHV6
Human herpesvirus 6
Microvascular spasm
Myocarditis
PVB19
Parvovirus B19
Journal
International journal of cardiology
ISSN: 1874-1754
Titre abrégé: Int J Cardiol
Pays: Netherlands
ID NLM: 8200291
Informations de publication
Date de publication:
01 08 2022
01 08 2022
Historique:
received:
15
12
2021
revised:
16
04
2022
accepted:
04
05
2022
pubmed:
10
5
2022
medline:
9
6
2022
entrez:
9
5
2022
Statut:
ppublish
Résumé
Coronary spasm has been suggested to be the underlying mechanism of chest pain in patients with myocarditis and unobstructed coronary arteries. Here we sought to investigate a potential association between virus type and coronary spasm endotype in patients with biopsy-proven viral myocarditis. A total of 618 consecutive patients with unobstructed coronary arteries who underwent endomyocardial biopsy between 2008 and 2018 were screened. Viral myocarditis defined as (immuno-)histological evidence of myocardial inflammation and proof of viral genome by PCR was confirmed in 114 patients. Of these, 34 patients had undergone additional intracoronary acetylcholine (ACh) testing and served as the final study cohort. Patients in this study were 51 ± 27 years old, 41% were female and mean left ventricular ejection fraction was 58 ± 23%. Most frequently, virus DNA was detected by PCR from parvovirus B19 (PVB19, 59%) and human herpesvirus 6 (HHV6, 26%). ACh testing revealed epicardial spasm in 10 patients (29%) and microvascular spasm in 11 patients (32%). The rate of coronary spasm was higher in patients with PVB19-associated myocarditis compared to those with HHV6-associated myocarditis (80% vs. 33%, p = 0.031). In particular, there was a higher prevalence of microvascular spasm in patients with PVB19 compared to HHV6 infection (45% vs. 0%, p = 0.018). Coronary spasm is a frequent finding in patients with biopsy-proven viral myocarditis supporting the hypothesis that coronary spasm may contribute to chest pain in these patients. We observed a particular association of microvascular spasm with PVB19 infection.
Sections du résumé
BACKGROUND
Coronary spasm has been suggested to be the underlying mechanism of chest pain in patients with myocarditis and unobstructed coronary arteries. Here we sought to investigate a potential association between virus type and coronary spasm endotype in patients with biopsy-proven viral myocarditis.
METHODS
A total of 618 consecutive patients with unobstructed coronary arteries who underwent endomyocardial biopsy between 2008 and 2018 were screened. Viral myocarditis defined as (immuno-)histological evidence of myocardial inflammation and proof of viral genome by PCR was confirmed in 114 patients. Of these, 34 patients had undergone additional intracoronary acetylcholine (ACh) testing and served as the final study cohort.
RESULTS
Patients in this study were 51 ± 27 years old, 41% were female and mean left ventricular ejection fraction was 58 ± 23%. Most frequently, virus DNA was detected by PCR from parvovirus B19 (PVB19, 59%) and human herpesvirus 6 (HHV6, 26%). ACh testing revealed epicardial spasm in 10 patients (29%) and microvascular spasm in 11 patients (32%). The rate of coronary spasm was higher in patients with PVB19-associated myocarditis compared to those with HHV6-associated myocarditis (80% vs. 33%, p = 0.031). In particular, there was a higher prevalence of microvascular spasm in patients with PVB19 compared to HHV6 infection (45% vs. 0%, p = 0.018).
CONCLUSION
Coronary spasm is a frequent finding in patients with biopsy-proven viral myocarditis supporting the hypothesis that coronary spasm may contribute to chest pain in these patients. We observed a particular association of microvascular spasm with PVB19 infection.
Identifiants
pubmed: 35533750
pii: S0167-5273(22)00659-3
doi: 10.1016/j.ijcard.2022.05.008
pii:
doi:
Substances chimiques
Acetylcholine
N9YNS0M02X
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1-4Informations de copyright
Copyright © 2022 Elsevier B.V. All rights reserved.