A comprehensive medical ECG (electrocardiogram) findings infographic for clinical reference. The infographic should be organized into clear labeled sections on a clean white background with a professional medical design. Section 1 - "Normal ECG Waveform" at the top: Show a single labeled ECG complex with P wave (atrial depolarization), PR interval (0.12-0.20s), QRS complex (ventricular depolarization, <0.12s), ST segment (isoelectric), T wave (ventricular repolarization), U wave, and QT interval labeled with arrows. Grid lines on ECG paper background. Normal intervals table alongside: PR 0.12-0.20s, QRS <0.12s, QT <0.44s, HR 60-100 bpm. Section 2 - "Ischemia & Infarction Patterns": Four small ECG strips side by side labeled: "Hyperacute T waves" (tall peaked T), "STEMI" (convex ST elevation with tombstone shape), "NSTEMI/UA" (ST depression + T inversion), "Q waves - old MI" (deep pathological Q wave >40ms wide >1/4 R height). Below each show which leads are affected: Anterior (V1-V4), Inferior (II, III, aVF), Lateral (I, aVL, V5-V6), Posterior (ST depression V1-V3). Section 3 - "Arrhythmia Patterns": Small strip examples of: Sinus tachycardia (regular, rate >100), Sinus bradycardia (regular, rate <60), Atrial fibrillation (irregularly irregular, no P waves, fibrillatory baseline), Atrial flutter (saw-tooth flutter waves 300bpm, 2:1 block), 1st degree AV block (PR >0.20s), 2nd degree Mobitz I (progressive PR lengthening then dropped QRS), 3rd degree complete heart block (complete P-QRS dissociation), VT (wide QRS tachycardia rate >100). Section 4 - "Hypertrophy Patterns": LVH criteria (SV1 + RV5 or V6 >35mm, strain pattern ST depression/T-inversion in I, aVL, V5-V6), RVH (dominant R in V1, right axis deviation >+110 degrees, T-inversion V1-V3). Section 5 - "Electrolyte & Drug Effects": Hyperkalemia progression (peaked T → wide QRS → sine wave), Hypokalemia (flat T, prominent U wave, ST depression), Hypocalcemia (prolonged QT), Hypercalcemia (shortened QT). Digoxin toxicity (scooped ST "reverse tick"). Section 6 - "Special Patterns": Brugada (RBBB + ST elevation V1-V3), WPW (delta wave, short PR), LQTS (QTc >500ms, risk of torsades), Pericarditis (saddle-shaped ST elevation all leads, PR depression), Pulmonary embolism (S1Q3T3 pattern, sinus tachycardia, new RBBB). Use a color-coded scheme: red for dangerous/critical findings, orange for abnormal, green for normal. Each section clearly labeled with large bold headers. Professional clinical infographic style suitable for medical education.