Clinical Characteristics and In-Hospital Mortality According to Left Main and Non-Left Main Culprit Lesions ― Report From the Japan Acute Myocardial Infarction Registry (JAMIR) ―

Q: What are the key findings of this study?

In patients with acute coronary syndrome, an unprotected left main coronary artery culprit lesion was associated with higher in-hospital mortality compared to non-left main lesions.

Q: What is the clinical evidence from this study?

Study design: Cohort. Population: Acute coronary syndrome (n=13548). Intervention: Left main coronary artery (LMCA) culprit lesion vs. Non-LMCA culprit lesion. Primary outcome: In-hospital mortality (p=<0.001).

Q: What does this research mean for the field?

Clinical characteristics and in-hospital mortality differ between acute coronary syndrome patients with left main versus non-left main culprit lesions undergoing percutaneous coronary intervention. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Kensaku Nishihira; Sunao Kojima; Misa Takegami; Satoshi Honda; Yoko M. Nakao; Jun Takahashi; Tomonori Itoh; Tetsu Watanabe; Morimasa Takayama; Hiroaki Shimokawa; Tetsuya Sumiyoshi; Kazuo Kimura; Satoshi Yasuda

doi:10.1253/circrep.cr-19-0056

November 28, 2019Circulation ReportsOpen Access

Clinical Characteristics and In-Hospital Mortality According to Left Main and Non-Left Main Culprit Lesions ― Report From the Japan Acute Myocardial Infarction Registry (JAMIR) ―

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Key result

Unprotected LMCA culprit lesions in ACS linked to ~4x higher in-hospital mortality vs non-LMCA lesions.

P<0.001
n=13,548

Figures

Why the study?

ACS due to an unprotected LMCA lesion is a critical condition, but data on in-hospital outcomes of PCI are limited.

How do clinical characteristics and in-hospital mortality differ between left main and non-left main culprit lesions in patients with acute coronary syndrome undergoing PCI?

Study Design

Type

Cohort (n=13,548)

Multicenter

Yes

Structured PICO

How do clinical characteristics and in-hospital mortality differ between left main and non-left main culprit lesions in patients with acute coronary syndrome undergoing PCI?

P

Population

13,548 patients with acute coronary syndrome hospitalized within 24 hours of onset in Japan, comparing those with unprotected left main coronary artery culprit lesions to those with non-left main lesions.

E

Exposure

Percutaneous coronary intervention (PCI) for unprotected left main coronary artery (LMCA) culprit lesions

C

Comparator

Percutaneous coronary intervention (PCI) for non-left main culprit lesions

O

Outcome

In-hospital mortalityhard clinical

Main Result

Absolute Event Rate: 23.3% vs 5.5%

p-value: p=<0.001

This registry-based study evaluates the in-hospital outcomes of PCI for critical unprotected left main coronary artery lesions in patients with acute coronary syndrome.

Limitations

Retrospective observational design with potential residual confounding or selection bias
Insufficient standardization of treatment across 10 regional registries
Unavailability of data on coronary artery bypass grafting (CABG) to assess its impact on in-hospital mortality
Exclusion of patients with out-of-hospital cardiac arrest who were not resuscitated
Lack of data on precise anatomical distribution of lesions and coronary artery dominance

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Implication

Informs in-hospital prognosis for unprotected left main PCI in ACS; hypothesis-generating and should not yet change practice.

Abstract

Background:Acute coronary syndrome (ACS) due to an unprotected left main coronary artery (LMCA) lesion is a critical condition, but there are limited data available on in-hospital outcomes of percutaneous coronary intervention (PCI).

Discussion

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Cite This Study

Nishihira et al. (2019) conducted a cohort in Acute coronary syndrome (n=13,548). Left main coronary artery (LMCA) culprit lesion vs. Non-LMCA culprit lesion was evaluated on In-hospital mortality (p=<0.001). In patients with acute coronary syndrome, an unprotected left main coronary artery culprit lesion was associated with higher in-hospital mortality compared to non-left main lesions.

synapsesocial.com/papers/6aab5478e8ab0d728b914b7b https://doi.org/10.1253/circrep.cr-19-0056

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Clinical Characteristics and In-Hospital Mortality According to Left Main and Non-Left Main Culprit Lesions ― Report From the Japan Acute Myocardial Infarction Registry (JAMIR) ―

Figures

Study Design

Structured PICO

Main Result

Limitations

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

Clinical Characteristics and In-Hospital Mortality According to Left Main and Non-Left Main Culprit Lesions ― Report From the Japan Acute Myocardial Infarction Registry (JAMIR) ―

Figures

Study Design

Structured PICO

Main Result

Limitations

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

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