Normal QT Interval Duration: 0.3-0.44 s (0.46 s for women); tends to increase as the heart rate decreases Bazett’s formula for corrected QT interval (QTc): QTc = QT/ √RR Prolonged QT Interval Duration: >0.44 s (men) and >0.46 s (women) Can lead to: Polymorphic VT (Torsades de pointes) Causes: Mnemonic:…
Tag: Cardiovascular system
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Alpha and Beta Adrenergic Receptors : Mnemonics
Location Alpha = Arteries and smooth muscles Beta = Beats or Breaths Types and Action 1 = Contract 2 = Dilate Receptors Alpha 1: Alpha 2: Beta 1: Mnemonic: We have 1 HEART Beta 2: Mnemonic: We have 2 LUNGS Beta 3: Mnemonic: 3 = Triglyceride
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Coronary Arteries : Mnemonic
Right coronary artery (RCA) Course: Branches: Mnemonic: TRaP Me IN Large: Small: Left coronary artery (LCA) Course: Branches: Mnemonic: LaTe PAD Large: Left Anterior Descending (LAD) artery – Small: Arterial supply of conducting system of heart 1. RCA: SA node, AV node, AV bundle 2. LCA: Right bundle branch of…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Venous Drainage of Heart : Mnemonic
Mnemonic: CAT 1. Coronary sinus (50%): Drains blood from left side of heart → Thebesian valve → Right Atrium 2. Anterior cardiac veins (20%): Drain blood from right side of heart → Right Atrium 3. Thebesian veins/Venae cordis minimi (30%): Drain deoxygenated blood from endocardium and myocardium → Respective chamber…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Aortic arch derivatives : Mnemonic
The aortic arches or pharyngeal arch arteries are formed sequentially with the pharyngeal arches. Aortic arch Derivatives Mnemonic 1st Maxillary artery (part) 1st arch is maximal 2nd Stapedial arteryHyoid artery Second = Stapedial 3rd Common carotid arteryProximal part of internal carotid artery C = 3rd letter of alphabet 4th Left: Aortic archRight: Subclavian…
Clinical Skills and Approaches 
Total Contact Cast (TCC) – Principles and Technique
Total contact cast (TCC) is a modification of traditional below knee plaster with minimal padding, covering to protect toes, and molding to the contour of the foot and leg so that there’s no movement withing the cast. Indications of Total Contact Cast Contraindications of Total Contact Cast 1. Absolute: 2….
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Heart Disease in pregnancy
Mortality risk associated with pregnancy Group I – Mortality <1% Group II – Mortality 5-15% Group III – Mortality 25-50% Commonest in Pregnancy Valvular heart disease: Mitral stenosis Congenital heart disease: ASD Cyanotic congenital heart disease: Fallot’s tetralogy (TOF) Predictors of Cardiac Events during Pregnancy N – NYHA Class >II…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Temporal Arteritis : Mnemonic
The 1990 ACR criteria for temporal arteritis can be remembered using the mnemonic: TEMPL3 T: Temporal artery abnormality (Tenderness or reduced pulse) E: Elevated ESR (50 mm/hr or more) M: Multinucleate giant cells (Present on biopsy) P: Pain (New onset localized headache) L: Later life (Age 50 years or over…