1. 15-Lead ECG
Nicole Gamblin, Alissa Graft, Holly Krause, Faith Metzinger, Sam Parmenter, Jenna Quill, Molly Reasner, Brittany Rowe, Allison Silver, Jessie Tucek

2. Objectives8
To determine the effect of utilizing additional leads with the conventional 12 lead ECG in patients presenting with suspected Posterior Myocardial Infarction (PMI)
To determine the utility of 15-lead ECG in the early diagnosis of acute posterior myocardial infarction
Wahab, S., Islam, A., Haque, M., Hossain, S., Kamal, M., Ali, S., & Mahabub, S. (2012). Comparative study between 12 and 15 lead electrocardiograms for evaluation of acute posterior myocardial infarction. Cardiovascular Journal, 4(2), Retrieved October 16, 2012

3. Background7
Acute posterior myocardial infarctions (PMI) and right ventricular myocardial infarctions are likely to be underdiagnosed; the standard 12-lead ECG does not assess these areas directly
Consequently, this underdiagnosis often leads to delay of early intervention and undertreatment
Leads V7, V8, and V9 view the posterior wall of the left ventricle, while leads V3R, V4R, and V5R reflect the status of the right ventricle and the posterior left ventricle
Somers, M., Brady, W., Bateman, D., Mattu, A., & Perron, A. (2003). Additional electrocardiographic leads in the ED chest pain patient: right ventricular and posterior leads. American Journal of Emergency Medicine, 21(7),
3rd bullet point: (Zalenski et al., 1997)

4. Background 6, 7, 8
The use of the additional leads might not only confirm the presence of AMI, but also provide a more accurate reflection of the true extent of myocardial damage.
May help clinicians identify the occluded vessel before PCI, which can help in stratifying risk and planning the procedure, and in identify reocclusion after coronary interventions
The 15-lead ECG can routinely be used in patients with ischemic-like chest pain.

5. Deanna's powerpoint
No evidence supporting which view is superior - either V7-V9 or VR leads

6. PICO
For a patient with signs and symptoms of an Acute Myocardial Infarction (AMI), will the use of additional posterior chest leads as compared to a standard 12 lead improve the efficacy of diagnosing posterior wall AMIs?

7. Problem: missing diagnoses, or delaying the diagnosis of posterior wall AMIs
Intervention: use of posterior chest leads
Comparison: 12 lead EKG
Outcome: improving diagnosis of posterior wall acute myocardial infarction

8. Significance of the Problem1, 3, 4
Posterior myocardial infarction is commonly missed because it is not usually visible in the standard leads
ST depression is absent in anterior leads of some patients who had ST elevation in posterior leads; slowing diagnosis and implementation of thrombolytic therapy
In the US alone, data shows that greater than 200,000 patients annually may have a coronary occlusion that is missed by the standard 12-lead ECG
only use reciprocal changes before

9. (Zalenski et al., 1997) (Zalenski et al., 1997)
51 year old man in ED presenting with symptoms of MI
Demonstrated diagnostic ST elevation only in the 18 lead ECG
Coronary angioplasty showed lesion in circumflex artery
(Zalenski et al., 1997)

10. (Khaw, 1999).
(Khaw, 1999).

11. Literature Review3, 8
ST segment elevation is not seen on the standard 12 lead ECG in up to 50% of patients with posterior or circumflex-related infarction
One study found 24% of participants had posterior injury that was not detected in the 12 lead. Adding 3 posterior leads found 17% more posterior injury patterns than the 12-lead.
(Khaw, 1999).

12. Literature Review Cont.8
In 345 patients with AMI, an additional 29 had ST elevation on nonstandard leads with when the 12 lead ECG was negative for ST elevation
Another study found that the sensitivity for the detection of left circumflex artery occlusion improved by twofold with the posterior leads. Additionally, 11% of patients with ST elevation in the posterior lead had no elevation or depression in any other lead.
The indication for thrombolytic therapy requires the presence of ST segment elevation in the standard 12-lead ECG. However, because ST segment elevation is not seen on the standard 12 lead ECG in up to 50% of patients with posterior or circumflex-related infarction, the presence of ST should be sought in leads V7-V9 (alyssas article)

13. Quality of the Research
Strengths
Mix of qualitative and quantitative studies
Comparison of results from many studies
Not limited to specific geographics, type of patient, unit, protocols, and treatments.
Weaknesses
Lack of randomized control trials
Small sample sizes
Research conducted within one hospital
Research conducted outside of the U.S.
Some research found that 15 lead, as compared to 12 lead, did not alter diagnosis, therapy, or care plan for ED patient population

14. AACN Levels of Evidence
Description A
Meta-analysis of multiple controlled studies or metasynthesis of qualitative
studies with results that consistently support a specific action, intervention,
or treatment B
Well-designed controlled studies, both randomized and nonrandomized, with results that consistently support a specific action, intervention, or treatment C
Qualitative studies, descriptive or correlational studies, integrative reviews, systematic reviews, or randomized controlled trials with inconsistent results D
Peer-reviewed professional organizational standards, with clinical studies to support recommendations E
Theory-based evidence from expert opinion or multiple case reports M
Manufacturer’s recommendation only

15. Levels of Evidence Level A Level B Level D
Somers, M., Brady, W., Bateman, D., Mattu, A., & Perron, A. (2003). A
Level B
Aqel, R. A., Hage, F. G., Ellipeddi, P., Blackmon, L., McElderry, H. T., Neal Kay, G., & Plumb, V. (2009).
McElderry, H. T., Neal Kay, G., & Plumb, V. (2009).
Katoh, T., Veno, A., Tanaka, K., Suto, J., & Wei, D. (2011).
Khaw, K. Moreyra, A. Tannenbaum, A. Holser, M. Brewer, J. Agarwal, B. (1999). Improved detection of posterior myocardial wall ischemia with the 15-lead electrocardiogram. American Heart Journal, 138(5).
Rosengarten, P., Kelly, A., & Dixon, D. (2001)
Wung, Shu-Fen. (2007)
Wahab, S., Islam, A., Haque, M., Hossain, S., Kamal, M., Ali, S., & Mahabub, S. (2012).
Level D
Krishnaswamy, A., Lincoff, M., & Menon, V. (2009)

16. Clinical Guideline (Protocol)
Individuals presenting with chest pain and other signs and symptoms of a suspected MI should have a 15-lead ECG in place of the usual 12-lead ECG protocol.

17. Implementation
Hospital wide statement to increase awareness of change in protocol and its significance
Education on placement and positioning of additional leads
Education on reading and interpreting the additional views from 15-Lead ECG
Considering updating and replacing current equipment if indicated
Purchase of additional leads

18. Barriers to Implementation
Additional time for placement of additional leads
Time to educate personnel on 15 lead ECG placement
Cost for new equipment for 15 lead ECG
Rosengarten, P., Kelly, A., & Dixon, D. (2001). Does routine use of the 15-lead ecg improve the diagnosis of acute myocardial infarction in patients with chest pain?. PubMed, 13(2),

19. Questions?

20. References
Aqel, R. A., Hage, F. G., Ellipeddi, P., Blackmon, L., McElderry, H. T., Neal Kay, G., & Plumb, V. (2009). Usefulness of three posterior chest leads for the detection of posterior wall acute myocardial infarction. The American Journal of Cardiology, doi: /j.amjcard
Katoh, T., Veno, A., Tanaka, K., Suto, J., & Wei, D. (2011). Clinical Significance of Synthesized Posterior/Right Sided Chest Lead Electrocardiograms in Patients with Acute Chest Pain. Journal of Nippon Medical School 78(1),
Khaw, K. Moreyra, A. Tannenbaum, A. Holser, M. Brewer, J. Agarwal, B. (1999). Improved detection of posterior myocardial wall ischemia with the 15-lead electrocardiogram. American Heart Journal, 138(5).
Krishnaswamy, A., Lincoff, M., & Menon, V. (2009). Magnitude and consequences of missing the acute infarct- related circumflex artery. American Heart Journal, 158(5), doi: /j.ahj
Rosengarten, P., Kelly, A., & Dixon, D. (2001). Does routine use of the 15-lead ecg improve the diagnosis of acute myocardial infarction in patients with chest pain?. PubMed, 13(2),
Somers, M., Brady, W., Bateman, D., Mattu, A., & Perron, A. (2003). Additional electrocardiographic leads in the ED chest pain patient: right ventricular and posterior leads. American Journal of Emergency Medicine, 21(7),
Wahab, S., Islam, A., Haque, M., Hossain, S., Kamal, M., Ali, S., & Mahabub, S. (2012). Comparative study between 12 and 15 lead electrocardiograms for evaluation of acute posterior myocardial infarction. Cardiovascular Journal, 4(2), Retrieved October 16, 2012
Wung, Shu-Fen. (2007). Discriminating Between Right Coronary Artery and Circumflex Artery Occlusion by Using a Noninvasive 18-Lead Electrocardiogram. American Journal of Critical Care, 16(1),