Failed ACLS written exam twice - what am I missing in the algorithm sections?
So I've bombed the ACLS written component twice now. I scored a 72% both times, and passing is 84%, so I keep tripping on the H's and T's, drug dosing sequences for VF/VT, and when to switch between rhythms. I study about 2 hours a night for 3 weeks before each attempt and clearly that's not cutting it.
I've been an RN for 6 years on med-surg, so I don't run codes often and the algorithms don't stick the way they do for ICU nurses. I bought the AHA provider manual but reading it straight through feels useless. I retain maybe 40% of what I read without doing practice scenarios alongside it.
I've been using resources aligned with the acl 2025 format which helped with rhythm identification, but I'm still weak on pharmacology — epinephrine timing, amiodarone vs lidocaine, the whole push-and-resume sequence during CPR.
I have 5 weeks until my next attempt and I'm willing to put in 3 hours a day. Did you drill algorithms separately from pharmacology, or mix everything together?
Printed every AHA flowchart and taped them to my bathroom mirror for 3 weeks. By test day I could walk through pulseless VT vs VF without thinking. For pharmacology I made flashcards with exact dose and timing — 1mg epi every 3-5 min, 300mg amiodarone first dose. Don't try to memorize the full manual, just the decision points.
Failed the first attempt at 78% and passed the second at 91%. The difference was doing megacode scenarios out loud even when alone — verbalizing “checking pulse, no pulse, beginning CPR, charging to 200J” wired the sequence into my head. Also don't skip the BLS refresher beforehand thinking you already know the CPR ratios.
Med-surg background here and I passed first try studying 90 minutes every day for 6 weeks straight. The key was understanding WHY each drug is given at that point in the algorithm, not just memorizing the sequence. Once you understand mechanism it's way harder to forget under pressure during the megacode.
The rhythm strip section is where most people bleed points. Get a separate EKG rhythm app and do 20 strips a day for two weeks. By the time I sat the written exam I could identify SVT vs VT vs afib in under 5 seconds, which probably bumped my score 8-10%.
Honestly I almost quit after my second fail and I'm glad I didn't. The thing that clicked for me was stop reading the algorithms and start drilling them like flashcards until the sequence felt automatic. For the H's and T's specifically, I memorized them as a story not a list — why each one causes arrest, not just what they are. Drug dosing for VF/VT I just did repetition over and over until I could spit it out half asleep.
One thing that actually helped me more than any textbook was finding solid practice questions that mimic the real written format. I stumbled on an acl practice test pdf that had scenario-based questions similar to what showed up on my actual exam. It's not magic but seeing the question style helped me understand what they're really testing — it's not memorization, it's pattern recognition. You've already put in the time, you just need to shift how you're studying, not how much.
I was in the exact same spot last year, 72% twice and completely convinced I knew the material. What finally clicked for me was stopping the passive review and just drilling the algorithms out loud, like literally saying "okay VF, no pulse, shock at 200J, CPR two minutes, epi 1mg, check rhythm" over and over until it felt automatic. The H's and T's were my biggest weakness too and honestly what helped was writing them on a notecard and then for each one asking myself what the specific treatment intervention was, not just what the cause was.
The switching between rhythms part is what trips most people up because it's not about memorizing a static flowchart, it's about reading what the monitor's telling you after each intervention. If you haven't tried doing practice scenarios where someone calls out a rhythm change mid-resuscitation and you have to respond in real time, that's worth doing before your next attempt. It felt silly doing it alone but it's honestly what made the difference for me on test three.
I failed my first attempt at 74% and honestly it was because I was trying to memorize the algorithms instead of understanding the logic behind them. What changed for me was stopping the passive re-reading and instead quizzing myself out loud, like literally talking through "okay V-fib, shock, CPR, epi, shock again" until it felt automatic. The H's and T's clicked when I stopped trying to memorize the list and started thinking about which ones actually cause a shockable rhythm versus a non-shockable one — that distinction helped me cut through a lot of the confusion on the written questions.
For drug dosing I made a single index card per scenario and drilled it daily for two weeks, not two hours crammed the night before. The written exam loves to throw in timing questions like when to give epi versus amiodarone in the sequence, so if you're fuzzy on that order it'll cost you every time. Also don't sleep on the post-cardiac arrest care section — that tripped me up on my first attempt and I hadn't even studied it properly because I thought the algorithms were the whole test.