- CODEN : IAJPBB
- issn 2349-7750
TITLE:
PREDICTIVE VALUE OF Q WAVES IN INFERIOR LEADS FOR THE DIAGNOSIS OF OLD INFERIOR WALL MYOCARDIAL INFARCTION (IMI)
AUTHORS:
Dr.Muhammad Sabir Raza, Dr.Ammara Akbar, Dr.Shireen Khan
ABSTRACT:
Background- The diagnosis of IMI on a regular performed ECG can lead to further imaging studies and consultation. The objective of this study is to examine both repolarization abnormalities and Q waves in inferior leads or only Q waves in inferior leads in IMI diagnosis through imaging studies. Methods- In this study all those 56 patients were included inferior wall myocardial infraction was diagnosed during computerized interpretation of ECG and imaging studies. The GE MAC-HD 5500 was used to perform ECG. MUSE GE system was used to interpret the Electrocardiograms. Using Standard techniques and equipment nuclear medicine cardiac imaging and ECG were interpreted and performed. To calculate binomial confidence interval(CI) SAS 9.3 software was used. Results- IMI was diagnosed during the computerized interpretation of Electrocardiograms when these were compared with confirmed IMI imaging studies, and the this had 52.7% positive predictive value. This positive predictive value was increased up to 80% when wider Q waves criteria than 0.04ms was added during ECG interpretation. Also, this positive predictive value was increased up to 92% in the presence of isoelectric or negative T waves and ST changes. Conclusion- “These results suggest that the computerized interpretation of ECG results in a high rate of false positive readings of old inferior myocardial infarction. This may result in over-utilization of imaging modalities. Presence of diagnostic Q waves in inferior leads, if accompanied by repolarization abnormalities, improves the accuracy of the electrocardiogram for the diagnosis of inferior wall myocardial infarction.” Keywords: Electrocardiograms, Q waves, Myocardial infarction
FULL TEXT
<Approved Journal
NLM ID:101711216 [Serial]
Included in EuroPub database
ICV 2015 - 61.16
Indexed In
S.J Impact Factor:7.157
cosmos Impact Factor:4.153
ICMJE Recommendations
IP Indexing Impact Factor: 2.76
Cover Page
