This Is Why with Dr. Busti

Warfarin (Vitamin K Antagonist; VKA) doesn’t have to be confusing. In this lecture from This is Why, Dr. Busti will explain warfarin's (Coumadin) pharmacology in a simple, clinically relevant way. It is perfect for anyone reviewing anticoagulation.

You’ll learn how to:
- Mechanism of action: how warfarin works as a vitamin K antagonist (VKA) (VKOR inhibition)
- What PT/INR measures and why INR monitoring matters
- How to start warfarin dosing (and what affects dose response)
- Bridging with heparin/LMWH (warfarin bridge / heparin bridge) and when it’s needed
- High-yield warfarin interactions (CYP2C9 inhibitors/inducers) + vitamin K foods
- Warfarin reversal basics (including vitamin K reversal)

The goal = make medical education easy and clinically relevant.

👉 Access bonus materials and downloads from this episode at: https://www.thisiswhy.health/topics/warfarin-vka-coumadin-anticoagulants-pharmacology-review

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#WarfarinPharmacology #VitaminKAntagonist #WarfarinDosing #WarfarinInteractions #drbusti

Disclaimer:
This content is for educational purposes only and is not medical advice. It does not replace individualized evaluation, diagnosis, or treatment. Always seek the advice of a qualified health provider with questions about a medical condition and never delay care because of educational content.

Factor Xa inhibitors (DOACs) made easy—fast, clear, and clinically relevant. In this lecture from This is Why, Dr. Busti will break down direct oral anticoagulants (DOACs) and how Factor Xa inhibitors work, with relevance.

You’ll learn how to:
- What Factor Xa inhibitors do (mechanism of action)
- Key drugs: Apixaban (Eliquis), Rivaroxaban (Xarelto), Edoxaban (Savaysa)
- Common indications: Afib stroke prevention, DVT/PE treatment
- Major adverse effects and safety: bleeding risk, interactions, and monitoring pearls
- Reversal overview: What to know + when it matters

The goal = make medical education easy and clinically relevant.

👉 Access bonus materials and downloads from this episode at: https://www.thisiswhy.health/topics/doac-factor-xa-inhibitors-anticoagulants-pharmacology-review

👉 Get more with a free membership at https://www.thisiswhy.health/
- Access free downloads from our videos 
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👍 If this helped you, please like, subscribe, and share it with a classmate or colleague. That will help this new channel continue producing free, high-yield medical education content.

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#FactorXaInhibitors #DOACs #Anticoagulation #Apixaban #drbusti

Disclaimer:
This content is for educational purposes only and is not medical advice. It does not replace individualized evaluation, diagnosis, or treatment. Always seek the advice of a qualified health provider with questions about a medical condition and never delay care because of educational content.

Direct Thrombin Inhibitors (DTIs) made simple and clinically relevant! In this lecture from This is Why, Dr. Busti will help you master direct thrombin (Factor IIa) inhibitors—including the oral DTI dabigatran (Pradaxa) and key parenteral DTIs like bivalirudin (and where argatroban fits clinically, especially in the acute care setting)

You’ll learn how to:
- Where direct thrombin inhibitors work in the coagulation cascade
- How dabigatran works (mechanism of action), major indications, and high-yield adverse effects
- What to monitor, common drug interactions, and who is at higher bleeding risk
- Dabigatran reversal with idarucizumab (Praxbind)
- PCI anticoagulation and how DTIs show up in clinical practice (including HIT treatment concepts)

The goal = make medical education easy and clinically relevant.

👉 Access bonus materials and downloads from this episode at: https://www.thisiswhy.health/topics/direct-thrombin-inhibitors-DTI-doac-anticoagulants-pharmacology-review

👉 Get more with a free membership at https://www.thisiswhy.health/
- Access free downloads from our videos 
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👍 If this helped you, please like, subscribe, and share it with a classmate or colleague. That will help this new channel continue producing free, high-yield medical education content.

🔔 Don’t forget to turn on notifications so you don’t miss upcoming lectures in pharmacology, medical rounds, and more!

#directthrombinInhibitors #DTIpharmacology #DabigatranPharmacology #Anticoagulation #drbusti

Disclaimer:
This content is for educational purposes only and is not medical advice. It does not replace individualized evaluation, diagnosis, or treatment. Always seek the advice of a qualified health provider with questions about a medical condition and never delay care because of educational content.

In this lecture from This is Why, Dr. Busti will make Community-Acquired Pneumonia (CAP) simple, practical, and clinically relevant—so you can confidently recognize CAP, assess severity, and choose the right pneumonia treatment.

What you’ll learn:

- How to approach CAP pneumonia like a clinician: presentation, diagnosis, and key differentials

- How to assess severity using CURB-65 and the Pneumonia Severity Index (PSI score)

- How to decide outpatient pneumonia vs inpatient pneumonia management

- How to choose CAP antibiotics with guideline-based empiric antibiotics pneumonia selection

- What “atypical coverage” means (and when you need it)

- Common pitfalls (including aspiration pneumonia vs CAP) and how to avoid them

The goal = make medical education easy and clinically relevant.

Access bonus materials and downloads from this episode at: https://www.thisiswhy.health/topics/community-acquired-pneumonia-cap-treatment-guidelines

Get more with a free membership at https://www.thisiswhy.health/

- Access free downloads from our videos 

- Access deep dive content from Dr. Busti

- Organize content via playlists & collections

- Join live Q&A

- Receive member newsletters

- Coupons & discounts for exam prep resources

If this helped you, please like, subscribe, and share it with a classmate or colleague. That will help this new channel continue producing free, high-yield medical education content.

Don’t forget to turn on notifications so you don’t miss upcoming lectures in pharmacology, medical rounds, and more!

#CommunityAcquiredPneumonia #CAP #PneumoniaTreatment #PneumoniaGuidelines #drbusti

Disclaimer:

This content is for educational purposes only and is not medical advice. It does not replace individualized evaluation, diagnosis, or treatment. Always seek the advice of a qualified health provider with questions about a medical condition and never delay care because of educational content.

Atrial fibrillation (AFib) made easy—clinically relevant ECG/EKG interpretation, how to recognize AFib with RVR, and how to approach AFib management from bedside to boards.

In this lecture from This is Why, Dr. Busti will , Dr. Busti breaks down atrial fibrillation in a clear, practical way so you can confidently answer:

- What is AFib and why does it matter clinically?

- How do you identify AFib on an ECG/EKG (classic “irregularly irregular” rhythm)?

- When is it atrial fibrillation with RVR and what do you do first?

- Rate control vs rhythm control: how to think about each strategy

- Stroke risk: using CHA2DS2-VASc (and bleeding risk with HAS-BLED)

- Anticoagulation in AFib: DOACs vs warfarin (high-yield clinical pearls)

The goal = make medical education easy and clinically relevant.

Access bonus materials and downloads from this episode at: https://www.thisiswhy.health/topics/atrial-fibrillation-afib-review-made-easy

Get more with a free membership at https://www.thisiswhy.health/

- Access free downloads from our videos 

- Access deep dive content from Dr. Busti

- Organize content via playlists & collections

- Join live Q&A

- Receive member newsletters

- Coupons & discounts for exam prep resources

If this helped you, please like, subscribe, and share it with a classmate or colleague. That will help this new channel continue producing free, high-yield medical education content.

Don’t forget to turn on notifications so you don’t miss upcoming lectures in pharmacology, medical rounds, and more!

#AtrialFibrillation #AFib #afibmanagement atrialfibrillationrvr #drbusti

Disclaimer:

This content is for educational purposes only and is not medical advice. It does not replace individualized evaluation, diagnosis, or treatment. Always seek the advice of a qualified health provider with questions about a medical condition and never delay care because of educational content.

Sulfa allergy is one of the most commonly reported drug allergies (often cited around ~6% of patients), and it frequently leads clinicians to avoid entire medication classes—sometimes unnecessarily. In this lecture from This is Why, Dr. Busti will break down what drugs to avoid with a sulfa allergy (and what’s usually safe) by focusing on the “why”: the chemical features that drive true sulfonamide allergy risk and what that means for real-world prescribing.

You’ll learn how to:

- Identify what makes a drug a “sulfonamide”

- Distinguish antimicrobial vs non-antimicrobial sulfonamides

- Understand the structural features linked to higher allergy risk (why Bactrim is different)

- Apply practical guidance for patients with a reported sulfa allergy

- Avoid unnecessary “all-or-nothing” medication exclusions while still prioritizing safety

The goal = make medical education easy and clinically relevant.

👉 Access bonus materials and downloads from this episode at: https://www.thisiswhy.health/topics/topics/sulfa-allergy-drugs-to-avoid

👉 Get more with a free membership at https://www.thisiswhy.health/

- Access free downloads from our videos 

- Access deep dive content from Dr. Busti

- Organize content via playlists & collections

- Join live Q&A

- Receive member newsletters

- Coupons & discounts for exam prep resources

👍 If this helped you, please like, subscribe, and share it with a classmate or colleague. That will help this new channel continue producing free, high-yield medical education content.

🔔 Don’t forget to turn on notifications so you don’t miss upcoming lectures in pharmacology, medical rounds, and more!

#SulfaAllergy #SulfonamideAllergy #Bactrim #SulfaCrossReactivity #drbusti

Disclaimer:

This content is for educational purposes only and is not medical advice. It does not replace individualized evaluation, diagnosis, or treatment. Always seek the advice of a qualified health provider with questions about a medical condition and never delay care because of educational content.

In this lecture from This is Why, Dr. Busti will break down the term odynophagia—how to pronounce it, how to use it correctly in charting and clinical conversation, and the most common conditions that cause swallowing pain (painful swallowing). This quick, high-yield refresher will help you confidently recognize and document odynophagia and avoid common mistakes (like confusing it with dysphagia).

In this video you’ll learn:

- What odynophagia means and how to say it

- How it differs from dysphagia

- Common causes of pain when swallowing (throat vs esophageal causes)

- High-yield differentials like esophagitis, GERD, and pill-induced esophagitis

- Why immunocompromised patients with odynophagia may need a different workup

Watch next in the Medical Dictionary series and build your terminology foundation for clinical practice and exams.

The goal = make medical education easy and clinically relevant.

👉 Access this episode at the website: https://www.thisiswhy.health/topics/odynophagia-painful-swallowing-medical-term-definition

👉 Get more with a free membership at https://www.thisiswhy.health/

- Access free downloads from our videos 

- Access deep dive content from Dr. Busti

- Organize content via playlists & collections

- Join live Q&A

- Receive member newsletters

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👍 If this helped you, please like, subscribe, and share it with a classmate or colleague. That will help this new channel continue producing free, high-yield medical education content.

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#Odynophagia #PainfulSwallowing #SwallowingPain #medicaldictionary #drbusti

Disclaimer:

This content is for educational purposes only and is not medical advice. It does not replace individualized evaluation, diagnosis, or treatment. Always seek the advice of a qualified health provider with questions about a medical condition and never delay care because of educational content.

In this lecture from This is Why, Dr. Busti will make the identification of the heart borders and heart chambers on a chest x-ray easy. Dr. Busti will walk step-by-step through how to identify the cardiac silhouette, locate the heart borders, and understand where the right atrium, left atrium, right ventricle, left ventricle, left atrial appendage, and apex of the heart sit on a standard PA chest x-ray (CXR).

You’ll see how to connect real heart xray images with the underlying heart anatomy.

You’ll learn how to:
- Identify normal heart borders on a chest xray
- Recognize which heart chambers form the right and left heart borders
- Understand where the right ventricle and left atrium actually sit on a CXR
- Use the silhouette sign to localize lung pathology next to the heart
- Apply a simple, repeatable approach to chest xray interpretation

The goal = make medical education easy and clinically relevant.

👉 Access bonus materials and downloads from this episode at: https://www.thisiswhy.health/topics/chest-xray-heart-borders-chambers-cxr

👉 Get more with a free membership at https://www.thisiswhy.health/
- Access free downloads from our videos 
- Access deep dive content from Dr. Busti
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- Receive member newsletters
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👍 If this helped you, please like, subscribe, and share it with a classmate or colleague. That will help this new channel continue producing free, high-yield medical education content.

🔔 Don’t forget to turn on notifications so you don’t miss upcoming lectures in pharmacology, medical rounds, and more!

#chestxrayheart #heartborderchestxray #heartxrayimages #ChestXRayHeartChambers #drbusti

Disclaimer:
This content is for educational purposes only and is not medical advice. It does not replace individualized evaluation, diagnosis, or treatment. Always seek the advice of a qualified health provider with questions about a medical condition and never delay care because of educational content.

In this lecture from This is Why, Dr. Busti will break down dysphagia—the medical term for difficulty swallowing—in a clear, clinically relevant way. You’ll learn what dysphagia means, how clinicians use the term, and how to quickly recognize the difference between oropharyngeal dysphagia vs esophageal dysphagia. We’ll also cover high-yield dysphagia causes, red flags, and common pitfalls that lead to missed diagnoses—especially when aspiration risk is overlooked.

What you’ll learn (quick + practical):

- Dysphagia definition and how it shows up in real patients (“trouble swallowing)

- Oropharyngeal vs esophageal dysphagia: symptom patterns that matter

- Common causes: stroke dysphagia, Parkinson disease, dementia, neurologic/neuromuscular conditions, GERD, strictures/rings, eosinophilic esophagitis, and achalasia

- Complications: aspiration, aspiration pneumonia, dehydration, malnutrition, food impaction

- Evaluation basics: bedside swallow assessment, swallow evaluation, modified barium swallow / VFSS, FEES, barium swallow, and upper endoscopy (EGD)

The goal = make medical education easy and clinically relevant.

👉 Access this episode at the website: https://www.thisiswhy.health/topics/dysphagia-difficulty-swallowing-medical-term-definition

👉 Get more with a free membership at https://www.thisiswhy.health/

- Access free downloads from our videos 

- Access deep dive content from Dr. Busti

- Organize content via playlists & collections

- Join live Q&A

- Receive member newsletters

- Coupons & discounts for exam prep resources

👍 If this helped you, please like, subscribe, and share it with a classmate or colleague. That will help this new channel continue producing free, high-yield medical education content.

🔔 Don’t forget to turn on notifications so you don’t miss upcoming lectures in pharmacology, medical rounds, and more!

#Dysphagia #DifficultySwallowing #Dysphagiacauses #medicaldictionary #drbusti

Disclaimer:

This content is for educational purposes only and is not medical advice. It does not replace individualized evaluation, diagnosis, or treatment. Always seek the advice of a qualified health provider with questions about a medical condition and never delay care because of educational content.

Are you looking at a portable chest x-ray and wondering, “Is this exposure good enough to trust?” In this video, we walk through how to check chest x-ray exposure step-by-step so you can quickly decide if a CXR is adequately penetrated and ready for interpretation. In this lecture from This is Why, Dr. Busti will provide you with a practical approach to how to read chest x-rays and judge image quality before making clinical decisions.

You’ll learn how to:
Recognize adequate CXR penetration using the “spine through the heart” rule
Apply a simple chest x-ray quality check (rotation, inspiration, projection, and exposure) at the bedside
Improve your confidence with portable chest x-ray technique

The goal = make medical education easy and clinically relevant.

👉 Access bonus materials and downloads from this episode at: https://www.thisiswhy.health/topics/chest-x-ray-exposure-adequate-cxr

👉 Get more with a free membership at https://www.thisiswhy.health/
- Access free downloads from our videos 
- Access deep dive content from Dr. Busti
- Organize content via playlists & collections
- Join live Q&A
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👍 If this helped you, please like, subscribe, and share it with a classmate or colleague. That will help this new channel continue producing free, high-yield medical education content.

🔔 Don’t forget to turn on notifications so you don’t miss upcoming lectures in pharmacology, medical rounds, and more!

#chestxrayexposure #chestxrayquality #CXRpenetration #portableCXR #howtoreadCXR

Disclaimer:
This content is for educational purposes only and is not medical advice. It does not replace individualized evaluation, diagnosis, or treatment. Always seek the advice of a qualified health provider with questions about a medical condition and never delay care because of educational content.