41 year old male CC: Chest pain

A 41 year old male is pulled over during morning rush-hour by sheriff’s deputies.

He states that he is on his way to the hospital because he is having chest pain. EMS is called to the scene.

The patient is awake, alert, and oriented to person, place, time, and event.

His skin is pink, warm, and moist.

He appears acutely ill and anxious.

He states that he has a history of high blood pressure and renal insufficiency. He takes several medications, but he can only recall that one of them is a beta blocker.

Onset: 1 hour ago while sleeping.
Provoke: Nothing makes the pain better or worse.
Quality: Patient describes the pain as a poorly localized “fullness” or “pressure”.
Radiate: The patient cannot tell whether or not the pain radiates.
Severity: The patient reluctantly gives the pain a 7/10.
Time: The patient states he has had the pain on several occasions over the past few months but did not seek medical treatment.

Vital signs are assessed.

Resp: 20
Pulse: 76
BP: 138/78
SpO2: 99 on RA

The cardiac monitor is attached.



A 12-lead ECG is captured.



What is your analysis of this ECG?

Does anything about it concern you?

Is this a STEMI?

Why or why not?

Note: This 12-lead ECG was captured in the back of an ambulance with the motor and generator running, but it shows excellent data quality.

See also:

41 year old male: CC: Chest pain – ANSWER

24 Comments

  • Max says:

    In terms of STEMI/NotAStemi, it certainly does meet the criteria for a STEMI activation. I'm trying to figure out how I'd tell the receiving ED doctor "I know I was looking at this, but I didn't want to activate the lab because. . ." and I just don't see that conversation going well for me. So I'd probably call, and have Cardiology meet me downstairs.ST elevation in the septal-antero region, with reciprocal in the lateral leads. That's what I think the receiving ED would hone in on, and hang me out by my ankles if I didn't call it in as such; especially given this guys "look".That said; he's definitely not communicating adequately based on the story. He seems either altered, or recalcitrant, to tell us the whole story. So I wouldn't be surprised to hear it fall out that there's some sort of recreational drug component – which he's likely not going to tell me on the scene as there are officers around. Hopefully that may fall out in the truck on the way. Cocaine induced MI would be high on my list of suspects given the patient's history, presentation, and behaviour. But until (unless) he confesses, I would play it in his best interests.

  • I'd agree with MaxI'd call a STEMI alert, even though in my mind it is borderline. But given his presentation, history, and this 12-lead, I'd much rather be safe than sorry.Max; where are you getting the recreational drug component? I'm not sure I saw anything to suggest that; however, my experience is very limited when it comes to cocaine induced MI.

  • Max says:

    There's nothing in the 12-lead making me say that, unfortunately. Given the patient's history of this having happened a few times over the past month or two, I'm just leaning towards mimics.The way the patient is being described just strikes me as evasive. Like he's hiding something, or just isn't quite all there. And of the mimics I can think of, the only one that I can see a patient acting evasive/strung-out over, is the cocaine use.

  • Hillis says:

    The 12 lead ECG shows HYPERACUTE T wave in the anterior leads V1-3 with contralateral changes with ST depression in the lateral leads I, aVL and V6 .. YES, it is anteroseptal STEMI -> Rush the patient to cath lab.

  • Mike says:

    I think I would hold off on the STEMI notification. Not that I wouldn't transport the pt emergently or perform serial EKG's. The peaked, hyperacute T waves concern me for hyperkalemia, which goes along with the renal insufficiency hx. Though they could represent an early stage of MI. The T wave inversions look "strainish," and there are some pretty high voltages (though) none seem to meet specific voltage criteria. This goes along with the HTN hx.So, close monitoring along with secure IV access. Rapid transport because between the presentation and the EKG's there seems to be some badness occuring. And the key, serial EKG's watching for progression of hyperkalemia, changes which firm up a STEMI dx, or new findings. The monitor didn't identify it as an "Acute MI," correct? Okay Tom, smack me down with the next EKG!Mike S.

  • Craig UK says:

    Hi. I agree that this chap has hyperacute T waves on the anterior leads, which may be normal variant, but as far as ST elevation, i see very little, especially as this can be normal on the two leads where there is minimal elevation. I would like to see the same patients ECG after opiates and nitrates. However, from the ECG shown i would say this is a high lateral NSTEMI unless the elevation develops in which a STEMI could be diagnosed. I dont know what your protocols are in the US but here in the UK he would not be taken straight to the lab unless a STEMI is thought.

  • Terry says:

    This looks alot like the strain pattern in the power point 12-lead interpretation–garcia. Strain pattern in Leads I and AVL. No cath lab this is an STE mimic. Still follow your c/p protocols though and fax the 12-lead.

  • Hve to agree, gonna call the ED with ?STEMI. I too have the a bit of hesistant skepticism. Being pu;lled over "rushing to the hospital for chest" tends to have the favor of acute onset POLice-itis, the only thing lacking is the smell of 2 carbon particles hydroxides and being in a cell at 3AM. But he has the contributory medical disorders, the right recent history answers and even a more than suggestive PE and 12 Lead with the backing of a not always but well recognized algorithm. The longer I'm in this business the more cynical I become, but I've also become a very conservative clincian, with the attitude that, I'd rather argue with an ER doc or triage nurse rather than an attorney or state regulator,

  • Christopher says:

    Does not meet STEMI criteria, however, I see STD I/aVL/V6 and STE in aVR. There is also septal STE, with what could be hyperacute T waves. It also could be normal STE for V1-V3 in men.Transport to a PCI capable facility with a call-in detailing ACS w/ elevation not quite meeting STEMI criteria. Transmit ECG if possible.

  • Anonymous says:

    Not a stemi…. sorry guys not enough elevation in anatomically continuous leads and i dont think those are reciprocal changes just general ischemia possibly. Plus the pt is boarderline for LVH and incomplete BBB. Think those are whats causing your "elevation". Bu before i made th decision to or not to call a cath lab i wld like right sided and posterior 12 leads.

  • Brown Frown says:

    Borderline criteria for LVH, the axis is starting to turn leftward, he's Beta-blocked, I'm going with a strain pattern w/ lateral ischemia.

  • akroeze says:

    The only thing I can add to the already excellent posts is that the ST segments seem to be concave. I gather from the recent teaching posts here that this tends to put things more towards the "mimic" side of things.

  • Anonymous says:

    I agree with Mike S. and view the strip shows more of a LV strain vs. STEMI.

  • Geoff says:

    Another good one. I also am stuck between the STEMI, Hyperkalemia & Strain Pattern. I wouldn't be able to call a STEMI alert because the computer didn't interpret STEMI. I would try to go towards a PCI center though.The T waves are very concerning to me especially based on his presentation. I was under the impression that hyperkalemia and peaked T waves first start in V3-V4, anybody have anything on this? Obviously, this could be a while in though if that is his problem. They do appear peaked though.The ST Depression in I & aVL look like a strain pattern, even though the LVH is just below the millivolt requirement. Also, the STE seems between 1 & 2 mm in V1 & V2. The S Wave in V1 is 18mm & V2 is at 23mm, the ST segment doesn't seem to change, but the T wave is definitely taller in V2. I thought the ST segment was supposed to elevate more in the leads with the deeper S Wave. The ST Depression does seem to be deeper in I to go with the taller R wave compared to aVL (something an ER Doc told me once, but I haven't researched yet). Oh, also, the transition seems a bit late and V5 & V6 seem like small complexes compared to I & aVL (does this mean anything w/ LVH?).Treat O2, IV, ASA, NTG, MS (based on time), serial ECGs. In terms of the ambulance running…baseline seems good…transport, fortunately my closest is also a PCI center, so I guess I'm cheating my way out on this one. Looking forward to more!

  • LVH with LAE. LV strain. T-waves are big with big QRS complexes. Normal varient.

  • Hillis says:

    Am still insisting for Acute Anterolateral STEMI.Hyperkalemia is unlikely becouse hyperkalemia will show tall tented DIFFUSE T wave in all leads not only confined to V1-V3 !!..WHY Strain pattern ??It is unlikely too becouse it does not fit the sokolow criteria for LVH (S in V1 + R in V5 or V6 ? 35 mm ) so count it firstly before saying the patient is having or not LVH..And please don't ignore the contralateral changes in the lateral leads even if minimal it has a significant clue for STEMI.

  • Lead 1 meets LVH limb lead criteria. With LAE, I am more convinced of LVH. I see the ST depression, looks like strain. I'm not always right, but it is my guess. The elevation in precordial leads looks normal with T wave discordance.

  • And it's S in v1 or v2, which ever is deeper.

  • Mark says:

    I agree that lead I does awfully close to meeting voltage criteria for LVH and the HTN hx and possible LAE are also suggestive. However, I think there are some subtle reasons to think the ST changes on this ECG suggest otherwise. I think the strongest evidence to the contrary is the fact that V1 appears to have somewhat more STE than V2 despite the fact that V2 clearly has a larger S wave. That would definitely not be consistent with LVH induced STE. Also, call me crazy, but is there slight STE in lead III? Between that and largest amount of STE being in V1 I would definitely want a right sided look. There is also evidence of lateral ischemia. V6 has obvious flattened, ischemic looking STD. That raises the possibility in my mind that the STD and flipped T's in I and aVL may be ischemic changes as well. They do look more "staininsh" than anything as someone already said but are you completely sure those T's aren't symmetric? I've never been great at eyeballing that but even if they aren't I think they are still suspicious for reciprocal changes to lead III in this context. It's not an overwhelming argument but I would definitely get a right sided ECG, obtain serial ECG's and strongly push for this guy to go to a STEMI receiving hospital.

  • Geoff says:

    Okay, reviewing the earlier LVH posts now, I do see you also said that the depression should be in proportion to the QRS height. So it appears the QRS height in I is proportional to the ST depression compared to aVL, but the ST elevation in V1 & V2 doesn't seem to correlate…I still wonder about the QRS in V6 not being very tall and the morphology of the STD in V5 & 6 is different than I & aVL.

  • Mark,The septal wall (v1/v2) are fed by the LAD, and the inferior wall(II, III, aVF) is fed by the RCA. This is true in almost everyone. This is why STE in both these areas would be very suspicious. Anything is possible. I am with you, if V1 STE is > V2 STE with a smaller amplitude S-wave in V1, this is significant.

  • Christopher says:

    Also the STE in aVR is suggestive of LCA occlusion and seems odd in the face of LVH. I went browsing through a few libraries of LVH ECGs and could not find one w/ elevation in aVR.

  • Christopher,Also the STE in aVR is suggestive of LCA occlusion and seems odd in the face of LVH. I went browsing through a few libraries of LVH ECGs and could not find one w/ elevation in aVR.I am so happy to see that someone else is examining aVR. STE in aVR > than STE in V1 is suggestive of Left Main coronary stenosis. Dr. Smith has sited this as a reciprocal change, while Dr. Amal Mattu states this is a representation of infarct in itself. It is may be a very significant finding. The findings indicative of LMCA stenosis: ST-segment elevation in aVR > ST-Elevation in V1The findings indicative of increased morbidity and/or mortality: ST-segment elevation in aVR & aVL Reciprocal ST depression in inferior leads Presence of right bundle branch block (RBBB) and/or left anterior fascicular block (LAFB) I noticed it on this 12-lead, but LVH is much more likely. I am unsure as well what both would look like together. So I follow the odds, and clinical picture… I'm not a good gambler.

  • Troy says:

    My guess is cardiac hypertrophy. I notice a strain pattern through the chest leads and with the I and aVL leads. The thing that concerns me is the STE in aVR. I would take him to a PCI capable center because I’m spoiled and have them close by and treat it like a CP. The thing I’m thinking is that they guy also has renal insufficiency so maybe he has some cardiomyopathy goin.

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EMS 12-Lead

Cardiac Rhythm Analysis, 12-Lead ECG Interpretation, Resuscitation

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Comments
Colleen
68 y.o. male with weakness: “Treat the monitor, not the patient?”
Allergies? O2, combivent, Calcium. Repeat 12lead ekg. 2nd set of signs. Depending on 2nd Ekg and 2nd set of signs with combivent, reassessment of patient after interventions. Depending on reassessment, 2nd/3rd VS, and 2nd EKG, would determine my decision on where to transport. Per Massachusetts protocols.
2014-10-02 05:57:52
Billy Bob
68 y.o. male with weakness: “Treat the monitor, not the patient?”
Well I will lean with Dave and go with more education; this is a classic sine wave EKG and with more education hopefully we all could spot this from across the door because again as Dave said this is something rarely seen in EMS if at all; this is the ONE TIME I will advocate…
2014-10-02 02:49:58
david
68 y.o. male with weakness: “Treat the monitor, not the patient?”
Looks like sine wave. QRS >.15 tall peaked T waves prolonged PRI, indicative of hyperkalemia. Calcium, bicarbonate, 50% dextrose perhaps even some albuterol, insulin at the Ed
2014-10-02 02:44:55
Hollywood Mike
68 y.o. male with weakness: “Treat the monitor, not the patient?”
ALS weakness and fall. Mental status is such that he remembers falling. I'm not going to get all excited about this tracing. I'm treating the guy for his complaint and watching him like a hawk during transport. I've seen some aberrant conduction that makes this ECG look like NSR so I'm jaded by experience (need…
2014-10-02 01:51:00
PandaMedic
68 y.o. male with weakness: “Treat the monitor, not the patient?”
It's great to see so many different points of view and styles, it's sad that so many of us are being critical and condescending towards other practitioners. Dave has a point, in that more education is needed, but there is something to be said for everyone who is here, reviewing these case studies and actively…
2014-10-02 01:45:45

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