A case of decreasing resistance in ER

a case decreasing resistance in er

I keep games on the 4th home screen of my cell phone. The third screen is blank. A minuscule of energy required to swipe my thumb has prevented me one too many times from mindlessly launching an RPG. Only to realize 2 hours later I had other plans for those 2 hours. An American comedian, the late Mitch Hedberg famously joked once,

Mitch Hedberg (1968-2005)
Mitch Hedberg (1968-2005)

I have always believed that the subtle truths kneaded so artfully in seemingly light, small-talk-worthy jokes are what makes a comedian a genius. How many times have you thought that you need to pick up that particular grocery or fill up that one conference form only to instead get consumed by what was easily available?

Our mind is built so that it follows the path of least resistance no matter how insignificant the resistance is. Although smudged all over the canvas of self-help, non-fiction genre, medicine somehow isn’t used frequently to exemplify the path of least resistance.

Today, I present to you a case that inspired us at Beltar, to remove one such small resistance from our workflow. The implications as you will see were no less than life-saving.

Rural Health System : Oversimplified

Before I present to you the case, a small preamble: Health care in rural Nepal is still run mostly by paramedics. No matter what spectrum you fall in terms of appreciating their work, the fact remains that they are the major workforce we have at the rural. It suffices to say that they are the portal of entry to the health system of our country for many. All emergency cases, once screened and declared complicated, the medical officer (usually a MBBS doctor) at the PHC sees the patient. Majority of cases are seen only by paramedics – considering 3 to 5 paramedics, usually and barely one medical officer in most PHCs.

A mobile game I wouldn't play

Now that the characters are in place, let’s dive right into the no less than a fairy tale land of the rural health system. Lamenting about the obvious lack of resources has been so old school that I don’t even make a typo while typing about it these days. We had one ECG machine at Beltar. The old ECG machine with its squeaky sound and myriad varieties of artifacts stood with all its mighty bulk inside a locked door of a room. The key protected from no one in particular by the office assistant who would open the door, drag the machine out, bring it to the bedside. The paramedic who decided to do the ECG would then untangle the wire glazed with what little of gel we had applied to the previous patient. He would then connect the limb leads and the pre-cordial leads with the trusty suction knobs which hopefully has some gel left from the previous use and then comes the biggest connection to be made: connecting the machine to the power grid. “Don’t you keep your machine charged!?”, you ask. We do. But the Li-ion battery probably has undergone autophagy, or whatever fancy name the process is given. That is a lot of steps and by extension, a lot of resistance. If this were a mobile game, I don’t think I would be addicted to it.

A Race Against Time

A patient with diabetes who had visited our ER a couple of times before was being monitored for chest pain at around 7 AM on a Saturday morning. I was washing my clothes on the first floor unaware that my Saturday is not going to be about laundry and daily chores. When I was called to check the patient, she was already deteriorating at a rate far greater than our PHC could ever catch up. We tried to borrow the speed of an ambulance and refer the patient to a higher center. An ST elevation in any two contiguous lead is an MI. Our paramedics knew that. To everybody’s surprise, ECG was not done! Given the fact that we did not have cardiac enzymes available at the PHC and Aspirin was all we could have prescribed before discharge anyway: we gave the patient 2 Aspirin tablets to chew and referred her as fast as we could. My paramedic colleagues have demonstrated utmost clinical competence and professionalism too many times to doubt any of that. The work environment was still error-prone and the circumstance demanded a change. Could we have changed the outcome given the same resources and clinical scenario? Maybe we need to decrease the resistance I thought. Changing how we store ECG (shown in the picture below), making it more accessible not only increased the frequency with which it was being used but also served as a reminder. A physical question hanging down the IV stand asking anyone who is attending a case, “Do you need to use me?”

ECG machine in plain sight with IV stand holding the limb and pre-cordial leads for accessibility

Workarounds: Because Solutions are Late to the Party.

If you have been following my writings, you’d have noticed this as another small tweak, a workaround, a nudge to the existing system so to speak that isn’t the substitute for the actual sustainable solution. Robust training that helps hard-working paramedics conceptualize and understand the protocols related to the use of basic yet life-saving diagnostics like ECG can be a start. We tried printing and pasting some protocols on the walls; another workaround we hope would help make patient care better until it actually sustainably improves. Another workaround that a friend suggested was: everyone who aches above the waist, gets an ECG. Such simplification works well to decrease the resistance in learning complex protocols. I am sure there are plenty of workarounds used worldwide, a necessity, after all, is the mother of invention. I leave you with a thought: What effect do you think will a systematic sharing of such workarounds among the rural healthcare workers will produce?

Guides to ECG electrode placement and protocols
Cite this article as: Carmina Shrestha, Nepal, "A case of decreasing resistance in ER," in International Emergency Medicine Education Project, February 21, 2020, https://iem-student.org/2020/02/21/a-case-of-decreasing-resistance-in-er/, date accessed: March 29, 2020

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Is Troponin Enough?

You are the emergency doc working in a rural ED. It is the Saturday night at 23:25 and you have three patients with chest pain. All have unchanged ECGs and normal troponins. All feel well now and want to go home if you think their results are okay. What is your plan for each of them?

Patient 1. Isabel D. is a 45-year old female with a history of hypertension. She presented to the emergency department with left-sided sharp chest pain. Her pain started after his evening run, and she vomited once. Her pain continued for one hour, but then it lessened spontaneously. Now she is feeling well, and she wants to go home. Her ECG is completely normal. Her 0- and 3-hour troponins are negative.

Paint 2. Daniel B. Is a 65-year old male with a history of smoking, hypotension and left bundle branch block (LBBB). He is obese. He presented to the emergency department with left-sided heavy chest pain, radiating to his left arm, chin, and back. He went to bed early today, and his chest pain woke him up. For half an hour, he has felt sweaty and nauseated but now he is feeling well, and he wants to go home. His ECG shows LBBB, unchanged compared to his previous ECGs and without Sgarbossa Criteria. His 0- and 3- hour troponins are negative.

Patient 3. Hank P. is a 54-year old male with a history of hypertension, diabetes mellitus and prior stroke with no sequel. For twenty minutes, he experienced a sharp pain in the middle of his chest. His pain had started while he was watching TV and he felt sweaty all in a sudden. he had His ECG shows findings related to left ventricular hypertrophy.  His 0- and 3- hour troponins are negative.

HEART Score

HEART Score was developed to predict the 6-week risk of a major adverse cardiac event of patients with chest pain, precisely in the emergency department setting (1). It outperformed the others, especially in exclusion of low-risk patients (2) Patients with a combination of HEART score of 0-3 and two negative troponins can be safely discharged from ED with no major adverse cardiac events (3). Patients with HEART Score of 4-6 requires admission and are candidates for further noninvasive investigations (1). Patients with HEART Score of ≥7 requires admission and are candidates for early invasive strategies (1).

HEART Score

CategoryScoreExplanationRisk Features
HistoryHigh-risk features
• Middle- or left-sided chest pain
• Heavy chest pain
• Diaphoresis
• Radiation
• Nausea and vomiting
• Exertional
• Relief of symptoms by sublingual nitrates

Low-risk features
• Well localized
• Sharp pain
• Non-exertional
• No diaphoresis
• No nausea and vomiting
Slightly Suspicious 0Mostly low-risk features
Moderately Suspicious+1Mixture of high-risk and low-risk features
Highly Suspicious+2Mostly high-risk features
ECG
Normal0Completely Normal
Non-specific Repolarization Disturbance+1Non-specific repolarization disturbance• Repolarization abnormalities
• Non-specific T wave changes
• Non-specific ST wave depression or elevation
• Bundle branch blocks
• Pacemaker rhythms
• Left ventricular hypertrophy
• Early repolarization
• Digoxin effect
Significant ST Depression+2Significant ST depression• Ischemic ST-segment depression
• New ischemic T wave inversions
Age
<450
45-64+1
≥ 65+2
Risk Factors• Obesity (Body-Mass Index ≥ 30)
• Current or recent (≤ 90 days)smoker
• Currently treated diabetes mellitus
• Family history of coroner artery disease (1st degree relative < 55 year old)
• Hypercholesterolemia

OR

Any history of atherosclerotic disease earn 2 points:
• Know Coroner artery Disease: Prior myocardial infarctions, percutan coronary intervention (PCI) or coronary artery bypass graft
• Prior stroke or transient ischemic attack
• Peripheral arterial disease
No known risk factors0
1-2 risk factors+1
≥ 3 risk factors or history of atherosclerotic disease+2
Initial Troponin
≤ normal limit0
1-3 x normal limit+1
> 3x normal limit+2
Please read articles 1,2,4 for more information.

Now, let’s look back on our patients.

Isabel’s pain has both high-risk (exertional, left-sided pain with vomiting) and (sharp pain, no diaphoresis) features; therefore, her pain is moderately suspicious. (H: +1) Her ECG is completely normal. (E: 0) She is 45 years old. (A: +1). She has one risk factor, hypertension. (R: +1) Her troponins are normal. (T: 0) Her HEART score is 3, and she can safely go home from the emergency department. The expected MACE rate in 30 days is 0%.

Daniel’s pain has mostly high-features (left-sided, radiating heavy chest pain with nausea and vomiting); therefore his pain is highly suspicious. (H: +2) His ECG is not completely normal but free of new ischemic changes. (E: +1) He is 65 years old. (A: +2). He has three risk factors, smoking, obesity, and hypertension. (R: +2) His troponins are normal. (T: 0) His HEART score is 7, and he is a candidate for early invasive intervention. You should admit him and call the cardiologist.

Hank’s pain has both high-risk (middle-sided chest pain with diaphoresis) and low-risk (non-exertional, sharp pain) features; therefore, his pain is moderately suspicious. (H: +1) His ECG is not completely normal but free of new ischemic changes. (E: +1) He is 54 years old. (A: +1). He has three risk factors, hypertension, diabetes mellitus and prior stroke. (Note that prior stroke alone earns two points) (R: +2) His troponins are normal. (T: 0) His HEART score is 5, and he is a candidate for noninvasive investigation. You should admit him.

PEARLS and PITFALLS

  1. ECG: If the ECG shows STEMI, do not wait for troponin or consider the HEART score. Call the cardiologist and consider activating angiography unit for the primary PCI.
  2. Troponins: If you first troponin is highly abnormal, do not wait for the second troponin or consider the HEART score. Call the cardiologist and consider activating angiography unit for the primary PCI. Additionally, the magnitude of change between the first and the second troponin is important in diagnosing acute myocardial infarction (5).
  3. Clinical Gestalt: You will gain a clinical gestalt over the years. If your clinical gestalt and any scoring disagree, always stay on the safe side for the patient’s benefit (4).
  4. Patient Safety: In the original study, the HEART score was combined with only one troponin. The adverse event rate was 2.5% for the HEART score 0-3 patients, 20.3% for the HEART score 4-6 patients and 72.7% for the HEART score ≥7 patients. Therefore, the author believes, the HEART score combined with two troponins is safer in the discharge of low-risk patients. Low-risk patients (i.e., HEART Score 0-3) with negative two troponins had no MACE within 30 days (3).

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REFERENCES

  1. Six, A. J., Backus, B. E., & Kelder, J. C. (2008). Chest pain in the emergency room: value of the HEART score. Netherlands Heart Journal, 16(6), 191-196. – link
  2. Radecki, R. (2013). Time to Move to the HEART Score. Available at: http://www.emlitofnote.com/?p=440 (Accessed: 17/07/2018) – link
  3. Mahler, S. A., Riley, R. F., Hiestand, B. C., Russell, G. B., Hoekstra, J. W., Lefebvre, C. W., … & Herrington, D. M. (2015). The Heart Pathway Randomized Trial: Identifying Emergency Department Patients With Acute Chest Pain for Early Discharge. Circulation: Cardiovascular Quality and Outcomes, 8(2), 195-203. – link
  4. Hyunjoo, L., & Rodriguez, C. (n.d.). HEART Score for Major Cardiac Events. Available at: https://www.mdcalc.com/heart-score-major-cardiac-events#evidence (Accessed: 17/07/2018) – link
  5. Roffi, M., Patrono, C., Collet, J. P., Mueller, C., Valgimigli, M., Andreotti, F., … & Gencer, B. (2016). 2015 ESC Guidelines for the management of acute coronary syndromes in patients presenting without persistent ST-segment elevation: Task Force for the Management of Acute Coronary Syndromes in Patients Presenting without Persistent ST-Segment Elevation of the European Society of Cardiology (ESC). European heart journal, 37(3), 267-315. – link

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iEM Education Project Team uploads many clinical picture and videos to the Flickr and YouTube. These images are free to use in education. You can also support this global EM education initiative by providing your resources. Sharing is caring!