Coronary Arteries : Mnemonic

Epomedicine, Jun 12, 2023Jun 12, 2023

Right coronary artery (RCA)

Course:

Origin: Anterior aortic sinus (right cusp) of ascending aorta
Between right auricle and pulmonary trunk root
Right anterior coronary (atrioventricular) sulcus
Winds round the inferior border of heart
Right posterior coronary sulcus
Posterior interventricular groove
Anastomose with left coronary artery

Branches:

Mnemonic: TRaP Me IN

Large:

Marginal (largest branch)
- Accompanied by Small cardiac vein
- Supplies: Right ventricle
Posterior Interventricular (Posterior Descending Artery/PDA)
- Accompanied by Middle cardiac vein
- Supplies: Diaphragmatic surface of both ventricles, Septal branch of AVN, Posterior part of interventricular septum
- Cardiac dominance: In 65% cases, PDA arise from RCA (right dominance) and in other cases from LCA (left dominance)
  - misleading term: because LCA always supplies greater myocardial portion

Small:

Nodal: Supplies SAN and both atria
Right atrial
Infundibular
Terminal

Coronary arteries — Coronary.pdf: Patrick J. Lynch, medical illustratorderivative work: Fred the Oysteradaption and further labeling: Mikael Häggström, M.D. Author info – Reusing images- Conflicts of interest: NoneMikael Häggström, M.D., CC BY-SA 3.0, via Wikimedia Commons

Left coronary artery (LCA)

Course:

Origin: Left posterior aortic sinus of ascending aorta
Between pulmonary trunk and the left auricle
Anterior interventricular groove
- Anterior interventricular artery: to apex of heart
- Circumflex artery (LCA): left anterior coronary sulcus → winds round left margin of heart → left posterior coronary sulcus → Supplies posterolateral wall of left ventricle
Anastomose with right coronary artery

Branches:

Mnemonic: LaTe PAD

Large: Left Anterior Descending (LAD) artery –

Anterior Interventricular
- Accompanied by Great cardiac vein
- Supplies: Anterior 2/3 of interventricular septum
Diagonal branch
- Supplies: Lateral wall of left ventricle

Small:

Left atrial
Pulmonary conus
Terminal

Arterial supply of conducting system of heart

1. RCA: SA node, AV node, AV bundle

2. LCA: Right bundle branch of AV bundle

3. Both RCA and LCA: Left bundle branch of AV bundle

Division of Coronary arteries

Coronary arteries → Epicardiac arteries → Final/intramural vessles

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Comment

Neelam says:

Jan 13, 2025 at 1:11 pm

Thankyou for mnemonics of coronary artery cause as a average student it was hard for me to learn and I’m a perfusion student

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