Document Detail


Electrocardiographic left ventricular hypertrophy in patients with suspected acute cardiac ischemia--its influence on diagnosis, triage, and short-term prognosis: a multicenter study.
MedLine Citation:
PMID:  7876948     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: To understand the diagnostic and short-term prognostic significance of electrocardiographic left ventricular hypertrophy (ECG-LVH) for patients who present to the emergency department with symptoms suggesting acute cardiac ischemia, defined as new or unstable angina pectoris or acute myocardial infarction. DESIGN: Subgroup analysis of a multicenter, prospective study of coronary care unit admitting practices in the prethrombolytic era. SETTING: The emergency departments of six New England hospitals: two urban medical school teaching hospitals, two medical school-affiliated community hospitals in smaller cities, and two rural non-teaching teaching hospitals. PATIENTS: 5,768 patients presenting with symptoms suggesting possible acute cardiac ischemia, including 413 patients who had ECG-LVH defined by the Romhilt-Estes point score criteria and 5,355 patients who had other electrocardiogram (ECG) findings. MAIN RESULTS: Only 26% of the 413 patients who had ECG-LVH were ultimately judged to have had acute cardiac ischemia, compared with 72% of patients who had primary ST-segment and T-wave abnormalities (p < 0.001) and 36% of those who had other ECG abnormalities (p < 0.001). Overall, the ECG-LVH patients were one-third less likely than the patients who did not have ECG-LVH to have had acute cardiac ischemia, after controlling for other predictors of acute ischemia by logistic regression (relative risk = 0.66, 95% CI 0.46 to 0.94). The patients who had ECG-LVH were only one-fourth as likely to have had acute myocardial infarctions as were the patients presenting with primary ST-segment and T-wave changes (12% vs 48%, p < 0.001). Instead, a much larger proportion had had congestive heart failure or hypertension. The admitting physicians had identified ECG-LVH poorly on the admitting ECGs: only 22% of those who had ECG-LVH had been correctly identified, and for more than 70%, the secondary ST-segment and T-wave changes of ECG-LVH had been read as being primary. The short-term mortality for the patients who had ECG-LVH was 7.5%. This was intermediate between the mortality for patients who had primary ST-segment and T-wave abnormalities (10.6%) and those who had other ECG abnormalities (5.1%). Mortality was not affected by whether the admitting physician had recognized ECG-LVH initially. CONCLUSION: ECG-LVH was not a benign ECG finding among the patients who had presented with symptoms suggesting an acute cardiac ischemic syndrome: short-term mortality among the patients who had ECG-LVH (7.5%) approached that for the patients who had primary ST-segment and T-wave abnormalities (10.6%, p = 0.10). However, the patients who had ECG-LVH were one-third less likely to have had any acute cardiac ischemia than were the patients who did not have ECG-LVH, after logistic regression was used to control for other predictors of acute ischemia. Specifically, acute myocardial infarction was only one-fourth as likely when LVH was present on the admitting ECG (12%) as it was when primary ST-segment and T-wave abnormalities were present (48%, p < 0.001). Instead, congestive heart failure and hypertensive heart disease were more common. Thus, routine use of thrombolytic therapy for patients who have ECG-LVH does not seem warranted. ECG-LVH was poorly recognized (in only 22% of cases) by the physicians in the present study. Better recognition of this common ECG finding may lead to more effective patient management.
Authors:
G C Larsen; J L Griffith; J R Beshansky; R B D'Agostino; H P Selker
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Publication Detail:
Type:  Comparative Study; Journal Article; Multicenter Study; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of general internal medicine     Volume:  9     ISSN:  0884-8734     ISO Abbreviation:  J Gen Intern Med     Publication Date:  1994 Dec 
Date Detail:
Created Date:  1995-03-31     Completed Date:  1995-03-31     Revised Date:  2009-02-24    
Medline Journal Info:
Nlm Unique ID:  8605834     Medline TA:  J Gen Intern Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  666-73     Citation Subset:  IM    
Affiliation:
Center for Cardiovascular Health Services Research, New England Medical Center, Boston, MA 02111.
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MeSH Terms
Descriptor/Qualifier:
Aged
Coronary Care Units
Electrocardiography*
Emergency Service, Hospital
Female
Humans
Hypertrophy, Left Ventricular / diagnosis*,  epidemiology
Likelihood Functions
Logistic Models
Male
Middle Aged
Myocardial Ischemia / diagnosis*,  epidemiology
Patient Admission
Prognosis
Prospective Studies
Risk Factors
Time Factors
Triage
Grant Support
ID/Acronym/Agency:
LM7044/LM/NLM NIH HHS; R01-HS02068/HS/AHRQ HHS; R01-HS05549/HS/AHRQ HHS
Comments/Corrections
Comment In:
ACP J Club. 1995 May-Jun;122(3):75

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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