• Diagnoses & symptoms - kisi bhi bimari ke baare mein
• Pharmacology - drugs, doses, mechanisms, interactions
• Pathophysiology - disease mechanisms
• Clinical cases - case-based reasoning
• Anatomy & physiology
• Recent medical evidence - latest studies aur guidelines

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ECG Padhna Sikhein - Step by Step Guide

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Sabse Pehle - ECG Kya Hai?

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STEP 1: ECG Paper Samjhein

Trick: Speed hamesha 25 mm/sec hoti hai - yahi standard hai.

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STEP 2: Waves Ko Pehchanein (P-QRS-T)

       QRS
  P     |     T
  |   /\|     |
  |  /  \     /\
--|--/----\---/--\---
      \  /
       \/

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STEP 3: Systematic Approach - "HR-PQRST" Method

1. Heart Rate (HR) kya hai?

• RR mein 1 badi square = 300 bpm
• RR mein 2 badi squares = 150 bpm
• RR mein 3 = 100 bpm
• RR mein 4 = 75 bpm
• RR mein 5 = 60 bpm

Yaad rakhne ki trick: "300, 150, 100, 75, 60, 50"

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2. Rhythm Regular hai ya Irregular?

• R-R intervals equal hain? = Regular rhythm (Normal Sinus Rhythm)
• R-R intervals vary kar rahe hain? = Irregular (Atrial Fibrillation ya kuch aur)

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3. P Wave dekhein

• Haan = Normal sinus rhythm
• Nahi / abnormal = Arrhythmia suspect karo

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4. PR Interval

• Normal = 0.12 - 0.20 sec (3-5 chhoti squares)
• Lamba (>0.20 sec) = Heart block (AV block)
• Chota (<0.12 sec) = Pre-excitation (WPW syndrome)

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5. QRS Duration

• Normal = < 0.12 sec (3 chhoti squares)
• Chauda (wide) QRS = Bundle Branch Block ya ventricular rhythm

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6. ST Segment aur T Wave

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7. QT Interval

• Normal QTc < 0.44 sec
• Lamba QT = Dangerous arrhythmia ka risk (Torsades de Pointes)

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STEP 4: Axis Determination (Shortcut)

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STEP 5: 12 Leads Ko Samjhein

LIMB LEADS (Arms & Legs):
  I, II, III → Standard limb leads
  aVR, aVL, aVF → Augmented leads

CHEST/PRECORDIAL LEADS:
  V1-V6 → Direct chest ke upar

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Clinical Practice ke liye Golden Rules

1. Rate, Rhythm, P wave, PR, QRS, ST/T - iss order mein hamesha check karo
2. ST elevation milte hi - STEMI protocol activate, time is muscle!
3. Wide QRS + fast rate = VT until proven otherwise - dangerous
4. No P waves + irregularly irregular = Atrial Fibrillation
5. Hamesha compare karo purane ECG se - changes matter karte hain

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Aage Kya Seekhein? (Step-by-step plan)

Week 1: Normal sinus rhythm perfect karo
Week 2: Rate aur rhythm abnormalities
Week 3: Bundle branch blocks (RBBB/LBBB)
Week 4: ST changes & MI patterns
Week 5: AV blocks
Week 6: Complex arrhythmias

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• 🫀 MI patterns (STEMI/NSTEMI)
• ⚡ Arrhythmias (AF, VT, SVT)
• 🔗 Bundle Branch Blocks
• 💊 Drug effects on ECG

• Phone (Android/iOS): Settings → Display → Dark Mode off karein
• Browser: Browser settings mein ja ke theme change karein
• Windows: Settings → Personalization → Colors → Light mode

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RR Interval - Square Count Method

Kaise Count Karein?

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Formula:

Heart Rate = 300 ÷ (RR interval ki badi squares)

Example upar wale diagram se:

RR mein = 4 badi squares
HR = 300 ÷ 4 = 75 bpm ✅ Normal!

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Ek Aur Trick - Chhoti Squares se:

HR = 1500 ÷ (RR interval ki chhoti squares)

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Yaad karne ki trick: "300 - 150 - 100 - 75 - 60 - 50" - bas yeh 6 numbers yaad rakho, kisi bhi ECG mein rate turant bata sakte ho! 🎯

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ECG ke Numbered Parts - Explanation

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Intervals (Double Arrow wale)

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Clinical Shortcut:

• ST utha (elevation) = STEMI 🚨
• PR lamba = Heart Block ⚠️
• QRS chauda = Bundle Branch Block
• QT lamba = Dangerous arrhythmia ka risk

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ECG - Har Cheez Numbered! Complete Visual Guide

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DIAGRAM 1: Normal Sinus Rhythm - 12 Parts Numbered

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DIAGRAM 2: STEMI - 8 Parts Numbered

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DIAGRAM 3: AF + Complete Heart Block + RBBB - 12 Parts Numbered

AF (1-4):

Complete Heart Block (5-8):

RBBB (9-12):

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Ek Nazar Mein - Master Summary

Normal    → 12 parts sahi hain, sab normal range mein
STEMI     → ST utha hua (6 no.) = Heart Attack Emergency 🚨
AF        → P waves gayab (1 no.) + irregular rhythm (2 no.)
Heart Block → P aur QRS ka rishta toot gaya (7 no.) = Pacemaker
RBBB      → Rabbit ears V1 mein (10 no.) = Wide QRS