Step 1 cardiac valve question cheat sheet:
Age > 70 = aortic stenosis
Age 20s-30s or pregnant = mitral stenosis (from rheumatic fever as a child)
Low ejection fraction = mitral regurgitation from dilated LV
Sudden onset dyspnea and murmur = mitral regurgitation from ruptured pap muscle or cord
Repaired tetralogy of Fallot = pulmonic regurgitation
History of IV drug use or carcinoid syndrome = tricuspid regurgitation
Tricuspid stenosis = almost never the right answer (very rare)
Pulmonic stenosis = almost never the right answer (also super rare) except for Noonan syndrome or Congenital Rubella
How to Create an FSMB Account (IMG Guide)
Step 1 – Go to FSMB
• Open the FSMB login page
• Click “Sign up now” (even if you already have ECFMG / USMLE)
https://t.co/2ZNaEhLcPe
MUST KNOW IMAGE FOR USMLE EXAMS: Anytime you see a hypersegmented neutrophil (≥5 lobes), bone marrow DNA synthesis is impaired and cells cannot divide normally. Failed attempts at division produce additional lobes. This finding is always associated with megaloblastic anemia (↑ MCV ↓Hct/Hgb). Classic causes include vitamin B12 and folate deficiency, but it also occurs with chemotherapy agents that impair DNA synthesis (MTX, 5-FU, hydroxyurea, etc). Burn this image into your memory.
🧬 Monoclonal Antibody Nomenclature (WHO 2021 Update)
💡 The WHO completely revised antibody naming rules in 2021.
The old –omab / –ximab / –zumab / –umab endings (based on murine → human origin) are obsolete.
Now, antibodies are classified by structure, function, and complexity, not by species source.
🔹 1️⃣ The “–tug” Family — Full-Length Monoclonal Antibodies 🧩
🧠 Meaning: Conventional, full-length IgG antibodies (both heavy & light chains present).
🎯 Structure: Standard Y-shaped antibody; intact Fc region; can mediate ADCC, CDC, etc.
💊 Use: Oncology, autoimmune, infectious, and inflammatory diseases.
⚙️ Example: Nivolotug (PD-1 inhibitor; corresponds to Nivolumab in the old scheme).
🧾 Note: “–tug” is the new universal default stem for typical monoclonal antibodies.
🔹 2️⃣ “–bart” — Engineered Full-Length Monospecific Antibodies 🧩
🎯 Meaning: Full-length antibodies that are monospecific but contain engineered constant (Fc) regions.
🔀 Purpose: Modifications can extend half-life, reduce effector function (ADCC/CDC), or improve stability.
🧠 Function: Maintain single-target binding while optimizing pharmacokinetics or safety.
💡 Example: Ozoralbart — engineered IgG with Fc modifications.
✨ Key point: “Bart” = engineered Fc in a full-length mAb, not inherently bispecific.
🔹 3️⃣ “–ment” — Fusion Proteins 🔗
⚙️ Meaning: Hybrid proteins where one part binds a target and another part performs a biologic function.
🧬 Often receptor extracellular domain fused to Fc fragment (e.g., TNFR–Fc).
🌿 Example: Emapalment (receptor–Fc fusion, like etanercept).
💡 “Ment” = merge / segment → signifies engineered fusion.
🔹 4️⃣ “–mig” — Multispecific or Immune-Modulating Antibodies 🌈
🔄 Meaning: Complex constructs that modulate immune pathways or target multiple cell types.
🧠 Includes tri-specific antibodies, T-cell engagers, or checkpoint modulators with advanced Fc engineering.
💥 Example: Abelomig.
💬 Mnemonic: “Mig” = modulating immune globulin.
🔹 5️⃣ “–pag” — Antibody Fragments 💧
⚡ Meaning: Smaller antibody fragments such as Fab, scFv, or nanobodies.
🚀 Rapid tissue penetration, short half-life, no Fc region.
🧬 Example: Ozoralpag (similar to certolizumab-type constructs).
💡 Mnemonic: “Pag” = partial antibody globulin.
🔹 6️⃣ “–cap” — Conjugated Antibodies 💣
💥 Meaning: Antibodies linked to a payload — cytotoxic drug, isotope, or imaging agent.
🎯 Mechanism: The antibody directs delivery; the payload executes killing or tracing.
🧠 Example: Datopotocap (represents ADCs like trastuzumab-emtansine).
⚡ Mnemonic: “Cap” = carrying a payload.
🧠 7️⃣ Infixes Still Used
Although stems changed, middle syllables (infixes) still indicate the target system:
•💢 –li– / –lim– → immune or inflammatory targets (e.g., interleukins, immune cells)
•🎗️ –tu– / –tug– → tumor or oncology targets
•🌿 –ki– / –kin– → cytokine or interleukin systems
•🧬 –ne– → nervous system targets
•🦠 –vi– → viral or infectious targets
🧩 8️⃣ Why WHO Changed It
🚫 Old classification (–omab, –ximab, –zumab, –umab) reflected species origin (murine → chimeric → humanized → human).
🔬 Today, almost all antibodies are human or humanized - those distinctions no longer matter.
🌍 Modern antibodies vary by design - bispecifics, fusion proteins, ADCs, nanobodies - not by species.
✅ New naming = neutral, descriptive, adaptable.
💡 9️⃣ Big Picture Summary
🔹 Old era → “Human vs. Mouse”
🔹 New era → “Format & Function”
🧩 –tug → classic full IgG
⚔️ –bart → artificial immunoglobulin
🔗 –ment → fusion protein
🌈 –mig → immune-modulating / multispecific
💧 –pag → fragment
💣 –cap → conjugate
#RheumatDocX #MedTwitter #RheumTwitter #rheumatology @IhabFathiSulima @DrAkhilX @CelestinoGutirr
Norepinephrine infusion dose calculation in shock state
Formula to use for mL/h:
[Dose (mcg/kg/min) / Concentration (mcg/mL)] x 60
▪︎(According to my hospital policy) usually dilute 2 ampoules (4 mg/4 ml)>>> total concentration (8 mg/8 ml) in 42 ml NS or D5W>>>> new concentration (8 mg/50 ml)= 160 mcg/ml
▪︎Dose of Norepinephrine 0.2 to 1 mcg/kg/min
If 70 kg patient, Dose 1 mcg/kg/min
1 x 70 x 60/160= 26.25 ml/hr (Maximum dose)
How do you use it according to your hospital policy in shock state? 🤔
1 minute Neuro hand exam: ‘Check your 6'. Ask your pt to give a boy scout salute (three finger salute- median/ulnar), an Ok (ant interosseus), then play 'Rock (median), Paper (radial), Scissors (Ulnar) & sign off w/ a 👍🏼 (radial) @bobvarkey#Neurology
🚨 𝙉𝘽𝙈𝙀 𝙟𝙪𝙨𝙩 𝙙𝙧𝙤𝙥𝙥𝙚𝙙 𝙁𝙤𝙧𝙢 32 𝙛𝙤𝙧 #𝙐𝙎𝙈𝙇𝙀 𝙎𝙩𝙚�� 1
Must practice before exam ✅
Other key self-assessments:
✔️ NBME 26–31
✔️ UWSA 1 & 2
✔️ Free 120 (old & new)
Best predictors of test day readiness .
#Step1#NBME#MedicalStudents