TIMI STEMI - 30-Day STEMI Mortality Tally

A timi stemi calculator is a bedside tally that turns eight Morrow 2000 criteria into a 0-14 score, a four-band triage label, and the published 30-day mortality percentage for a patient with a confirmed ST-elevation myocardial infarction. The acronym stands for Thrombolysis In Myocardial Infarction, the same trial group that derived the original UA/NSTEMI score, and the STEMI version is the bedside tool for the cath lab, the CCU, and the ED.

• • STEMI triage in the emergency department: An ED team weighing primary PCI activation, transfer, or fibrinolysis.
• • Cath lab pre-activation risk review: A cardiology fellow pre-activates the cath lab and needs a defensible answer to how sick the patient is on arrival.
• • Coronary care unit monitoring intensity: A CCU or step-down charge nurse uses the score to decide between telemetry and a monitored bed for the first 24 hours.
• • Discharge planning and family discussion: An inpatient team uses the score to set expectations with the patient and family about the first 30 days after STEMI.

The score was derived by Morrow and colleagues in 1,414 STEMI patients in the InTIME II trial and published in Circulation in 2000. It was validated in 84,029 STEMI patients from NRMI 3.

When the same admission also runs an NSTEMI or mixed ACS workup, the Grace Calculator gives the parallel in-hospital and 6-month GRACE probabilities that often sit next to the score in the chart.

The calculator reads each of the eight Morrow 2000 criteria as a 0-or-weighted input, sums the points, and reads the total against the InTIME II 30-day mortality table to return a risk band and a next-step phrase.

• Age tier: Younger than 65 = 0, 65 to 74 = 2, 75 or older = 3 points.
• Diabetes, hypertension, or angina: Composite 1-point criterion, counts once.
• Heart rate above 100 bpm: Strictly above 100 bpm on the presenting rhythm strip.
• Killip class II to IV: Class II: rales or S3. Class III: pulmonary edema. Class IV: cardiogenic shock.
• Systolic blood pressure below 100 mmHg: Strictly below 100 mmHg on admission.
• Anterior lead ST elevation or LBBB: Anterior lead ST elevation (V1 to V4) or new left bundle branch block.
• Time to treatment above 4 hours: Symptom onset to reperfusion, not door-to-balloon.
• Body weight below 67 kg: Under 67 kg (about 150 lb).

The 30-day mortality rates come from the Morrow 2000 InTIME II cohort: 0.8 percent at 0, 1.6 at 1, 2.2 at 2, 4.4 at 3, 7.3 at 4, 12.4 at 5, 16.1 at 6, 23.4 at 7, and 35.9 at 8 or more in a single bucket. The same stepwise pattern held in the NRMI 3 cohort of 84,029 STEMI patients.

According to Morrow et al. 2000, Circulation, the score was derived in 1,414 STEMI patients in the InTIME II trial and assigns up to 14 points across eight criteria, with 30-day all-cause mortality rising from 0.8 percent at 0 to 35.9 percent at 8 or more.

When the heart rate field hinges on the presenting rhythm strip and the user wants to confirm the ventricular response, the ECG Heart Rate Calculator gives a quick beat-per-minute check that often runs in parallel to the score.

The eight Morrow 2000 criteria fall into four groups: patient factors, presenting vital signs, bedside exam and ECG, and time or weight modifiers.

The age tier and the composite risk-factor criterion overlap with cardiovascular risk factors from primary-prevention scores, but the score applies them at an acute admission rather than at baseline.

Because the systolic blood pressure criterion is the highest-weighted vital sign in the score, the Blood Pressure Calculator supports a quick cuff, mean arterial pressure, and pulse-pressure check that often sits next to it in the chart.

Work through the eight Morrow 2000 criteria in any order, then read the total, the risk band, and the 30-day mortality percentage.

1. 1 Confirm the STEMI diagnosis: Pull the 12-lead ECG and confirm persistent ST elevation in two contiguous leads or new LBBB.
2. 2 Score the age tier and risk factors: Mark the age tier (0, 2, or 3). Mark the composite DM/HTN/angina criterion as 1 point if any of the three is documented.
3. 3 Score the presenting vital signs: Mark HR above 100 bpm as 2 points and SBP below 100 mmHg as 3 points using the first monitored reading.
4. 4 Score the bedside exam and ECG: Mark Killip class II to IV as 2 points. Mark anterior lead ST elevation or new LBBB as 1 point.
5. 5 Score the time and weight modifiers: Mark time from symptom onset to treatment above 4 hours as 1 point. Mark weight below 67 kg as 1 point.
6. 6 Read the total and the risk band: Sum the points to a 0-14 total, look up the 30-day mortality percentage, and read the four-band triage label.

A 64-year-old with no prior history, HR 88, SBP 132, Killip I, inferior ST elevation, and a 2-hour symptom-to-needle time. Total 0, low risk band, 0.8 percent 30-day mortality. Reperfusion proceeds per the standard STEMI pathway.

When the same admission includes a renal function review to set the contrast load for primary PCI or the anticoagulant dose, the GFR Calculator gives the estimated clearance that often sits next to the score in the chart.

The calculator is a one-page conversation aid that turns eight clinical variables into a number, a risk band, and a next-step phrase.

• • Standardised early risk stratification: ED, cardiology, critical care, and trainees use the same eight Morrow 2000 criteria.
• • Documented link to the InTIME II and NRMI 3 cohorts: The calculator ties the total to the Morrow 2000 mortality table and the NRMI 3 validation.
• • Automatic next-step phrase: The calculator returns a concise next-step phrase matched to the risk band.
• • Pairing with the GRACE score for mixed ACS: A 0-14 total sits next to a GRACE in-hospital and 6-month probability.
• • Sensitive documentation of patient and family discussions: A documented score and 30-day mortality band is a defensible basis for prognosis and goals-of-care conversations.

The strongest benefit is structure. A free-text triage assessment often misses the age tier weighting, the composite risk factor criterion, or the weight modifier, and the score makes those omissions visible.

When the same patient later has an atrial fibrillation review during the admission, the Cha2ds2 Vasc Calculator gives the parallel stroke-risk tally that often sits next to the score in the cardiology chart.

Several inputs to the calculator can move the total up or down, and the same total can mean different things in different patients.

• • The score is a 30-day all-cause mortality estimate, not a diagnostic test. A low score does not rule out a future event, and a high score does not mean reperfusion should be withheld.
• • The 30-day mortality percentages are anchored to the Morrow 2000 InTIME II cohort and the NRMI 3 cohort, which used fibrinolysis-era data. Contemporary primary PCI cohorts may have different absolute rates.

A high score is a flag for closer monitoring and hemodynamic support, not a reason to withhold reperfusion. The 2013 AHA/ACC STEMI guideline lists it as a validated bedside tool.

According to Morrow et al. 2001, JAMA, the score was validated in 84,029 patients from NRMI 3 and showed a stepwise increase in in-hospital mortality with increasing score.

According to O'Gara et al. 2013 ACCF/AHA STEMI Guideline (Circulation), the TIMI risk score is a simple bedside tool that can be used for early risk stratification at presentation in patients with ST-elevation myocardial infarction undergoing reperfusion therapy.

When the same admission later reviews bleeding risk for anticoagulation or antiplatelet therapy, the Has Bled Calculator gives the parallel nine-letter bleeding tally that often sits next to the score review in the chart.