EKG waves
- P wave
- Atrial depolarization
- QRS
- Ventricular depolarization
- T wave
- Ventricular repolarization
- PR interval
- 120–200 ms
Cardiac Cheat SheetFree · 12,400+ students♥ Cardiac System · Cheat Sheet
Master the cardiac system in one page.
Stop drowning in 40-page lecture notes. This is the exact one-page study guide top nursing and med students use to lock in anatomy, the cardiac cycle, EKG waves, and every high-yield clinical fact — before their next exam.
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Sound familiar?
Your exam is in 6 days. You've re-read the same 40 pages twice. Nothing sticks.
The cardiac system doesn't need more notes. It needs the right notes — pressure-tested against real exam questions, boiled down to the 20% that actually gets tested. That's what's on this page.
What's inside
Everything high-yield. Nothing filler.
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Full heart anatomy — labeled.
Chambers, valves, coronary arteries. See it once, remember it forever.
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The cardiac cycle, decoded.
Systole, diastole, and the pressure changes that make sense of every murmur.
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EKG waves you'll actually be tested on.
P, QRS, T, PR, ST — what they mean, what breaks them, and how to spot it fast.
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Blood flow, step-by-step.
Vena cava → body. Follow the exact path in 10 seconds flat.
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Normal values worth memorizing.
HR, BP, stroke volume, cardiac output, ejection fraction — the numbers professors love asking.
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Clinical correlates that come up on exams.
MI, CHF, arrhythmias, hypertension — the one-line rules to nail them.
Peek inside
A few highlights from the sheet
Real snippets — not marketing fluff. This is what actually lands in your inbox.
Numbers to memorize
| Heart rate | 60–100 bpm |
| Blood pressure | 120/80 mmHg |
| Stroke volume | 70 mL |
| Cardiac output | 4–8 L/min |
| Ejection fraction | 55–70% |
Blood flow — 10 seconds
- 1Vena cava
- 2Right atrium → tricuspid
- 3Right ventricle → pulmonic
- 4Pulmonary arteries → lungs
- 5Pulmonary veins → left atrium
- 6Mitral → left ventricle
- 7Aortic valve → aorta → body
Clinical correlate — MI
Classic presentation
Crushing substernal chest pain, radiates to left arm/jaw, diaphoresis, nausea.
EKG clue
ST elevation in contiguous leads = STEMI. Reciprocal depression in opposite leads.
Labs
Troponin ↑ (peaks 24h, stays 7–10d). CK-MB rises 4–6h.
First-line Rx
MONA — Morphine, Oxygen (if hypoxic), Nitrates, Aspirin.
Murmur cheat
- Aortic stenosis
- Systolic, crescendo-decrescendo, radiates to carotids.
- Mitral regurgitation
- Holosystolic, radiates to axilla.
- Aortic regurgitation
- Early diastolic, blowing, at LSB.
…plus the full anatomy diagram, cardiac cycle breakdown, and 6 more clinical correlates. Grab the sheet →
Student reviews
"I wish I had this last semester."
★★★★★
"Went from a 74 to a 92 on my cardio exam. This sheet was the difference. Legit."
★★★★★
"Printed it, laminated it, took it into every clinical. My cheat code for cardiology."
★★★★★
"The EKG breakdown finally made P-QRS-T click. Should be handed out on day one."
Quick questions
+Is it really free?
Yes. Drop your name and email, and the PDF downloads instantly. No card, no trial.
+Who is it for?
Nursing students, med students, PA and NP students, paramedic trainees — anyone who has to know the cardiac system cold.
+What format?
One-page PDF. Print it, tape it to your wall, drop it in Notability. Works everywhere.
+Will you spam me?
No. You'll get the cheat sheet, plus the occasional high-yield study drop. Unsubscribe with one click.
Your next cardiac exam starts here.
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