My Heart

The role of the heart is to pump blood (full of oxygen and nutrients) to all parts of the body (organs, muscles, bone and skin), via a network of arteries (carry blood to the body) and veins (carry blood back to the heart).

The normal human heart is about the size of a fist and weighs 250-350 grams, depending on sex and body size. It sits behind the breastbone (sternum) and slightly to the left.

The heart has three major components:

Muscle (walls)

  • The heart consists of four chambers; the upper two are the atria (receive blood) and the bottom two are the ventricles (eject blood)

  • The right sided chambers receive oxygen poor blood from the body and pump it to the lungs
  • The left sided chambers receive oxygen rich blood from the lungs and pump to the body
  • There are four heart valves (mitral, aortic, tricuspid and pulmonary) that function as ‘one-way’ valves, preventing blood from going the wrong direction

Coronary arteries (plumbing)

  • There are 3 main arteries that arise from the aorta (main blood vessel exiting the heart). These blood vessels supply the heart muscle with blood, with each artery supplying a different part of the heart muscle.
  • The coronary arteries are:

    Left main coronary artery – this branches into the:

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

    Right coronary artery (RCA)

  • Each of the main vessels has several smaller side branches

Electrical conduction system (wiring)

  • The conduction system of the heart is a specialised group of cells and pathways responsible for carrying the ‘electrical signals’ to the heart muscle and ensuring that these muscles contract in a co-ordinated and organised way.
  • There is a group of specialised cells located within the sinoatrial node, this functions as the heart’s internal pacemaker. These cells respond to the impulses from the brain, the body’s hormones (i.e. adrenaline) and medications.

Our Locations

Free Parking At All Locations
Cardiology Tasmania has 5 specialist centres located in Derwent Park, Huonville, Oatland, Swansea and Rokeby. As well as our fixed locations, our cardiology specialists and consultants travel to regional and remote areas to ensure all patients have access to cardiology services regardless of where they live.
Call Us:
0439 195 660
Derwent Park
  • Northcare Health Centre, 254 Main Road, Derwent Park, TAS

  • 62728869
Huonville
  • Huon Valley Health Centre, 85 Main Road, Huonville, TAS
  • 62642800
Oatlands
  • Midlands Multipurpose Health, 13 Church Street, Oatlands, TAS
  • 61350540
Swansea
  • Swansea General Practice: 37 Wellington Street, Swansea, TAS
  • 62578205
Rokeby
  • Knopwood Medical Centre: 46 South Arm Road, Rokeby, TAS
  • 62471019

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