Coronary Circulation

  • Arterial circulation
  • Venous circulation
  • Coronary Collaterals
  • Cardiac Lymphatics
  • Nerve supply of heart

Coronary arteries supply blood to specific areas of the heart.Coronary arteries supply blood to specific areas of the heart.

Coronary arteries supply blood to specific areas of the heart.

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The coronary arteries supply blood, oxygen, and nutrients to the heart muscle and the conduction system.

The two principal coronary arteries are:

  • Left main coronary artery (LMCA)
  • Right coronary artery (RCA)

The left main stem bifurcates to form the:

  • Left anterior descending artery (LAD)
  • Left circumflex artery (LCx)

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Blood supply to the heart ...

The right coronary artery supplies blood to:

  • Right venticle
  • Right atrium
  • Diaphragmatic surface/inferior wall of LV
  • Posterior wall of left ventricle (90%)
  • Posterior third of interventricular septum
  • SA node (55-60%)

The LMCA/LAD supplies blood to:

  • Anterior and lateral wall of LV
  • Most of the left ventricle
  • Interventricular septum (anterior 2/3rd)
  • Right and left bundle branches

The LMCA/LCx supplies blood to:

  • SA node (40-45%)
  • Left atrium
  • AV node and bundle of His (10%)
  • Lateral wall of LV