Know your heart

Know​ ​Your​ ​Heart

We​ ​all​ ​know​ ​that​ ​Heart​​ ​is​ ​a​ ​crucial​ ​organ​ ​in​ ​our​ ​body​ ​that​ ​constantly​ ​and​ ​tirelessly​ ​pumps​ ​blood to​ ​all​ ​parts​ ​of​ ​our​ ​body.​ ​It​ ​starts​ ​functioning​ ​at​ ​about​ ​6​ ​weeks​ ​of​ ​Intrauterine​ ​Life.​ ​From​ ​then​ ​it functions​ ​continuously​ ​till​ ​the​ ​very​ ​end​ ​of​ ​life.​ ​Normal​ ​functioning​ ​of​ ​every​ ​other​ ​organ​ ​is dependent​ ​on​ ​the​ ​normal​ ​functioning​ ​of​ ​heart.

©​ ​2017​ ​Heart​ ​and​ ​Aorta​​ ​All​ ​Rights​ ​Reserved

Chambers​ ​Of​ ​Heart Heart​ ​has​ ​4​ ​chambers-​ ​two​ ​Atria​ ​(atrium-singular)​ ​and​ ​two​ ​Ventricles.​ ​The​ ​atria​ ​have​ ​thinner walls​ ​compared​ ​to​ ​those​ ​of​ ​ventricles​ ​which​ ​are​ ​thick​ ​and​ ​muscular.​ ​The​ ​atria​ ​receive​ ​blood​ ​and ventricles​ ​pump​ ​blood.​ ​The​ ​wall​ ​that​ ​separates​ ​left​ ​and​ ​right​ ​atria​ ​is​ ​known​ ​as​ ​Inter​ ​Atrial Septum​ ​(IAS)​ ​and​ ​the​ ​one​ ​that​ ​separate​ ​ventricles​ ​is​ ​called​ ​Inter​ ​Ventricular​ ​Septum(IVS)

Blood​ ​Vessels​ ​Attached​ ​To​ ​Heart Right​ ​Atrium​ ​has​ ​two​ ​large​ ​veins​ ​bringing​ ​blood​ ​to​ ​it.​ ​Superior​ ​Vena​ ​Cava​ ​(SVC)

Major​ ​Vessels​ ​Of​ ​Heart Right​ ​Atrium​ ​receives​ ​blood​ ​from​ ​all​ ​over​ ​the​ ​body​ ​through​ ​two​ ​large​ ​veins.​ ​Superior​ ​Vena​ ​Cava (SVC)​ ​brings​ ​blood​ ​from​ ​upper​ ​body​ ​while​ ​Inferior​ ​Vena​ ​Cava​ ​(IVC)​ ​drains​ ​the​ ​lower​ ​body.​ ​IVC

©​ ​2017​ ​Heart​ ​and​ ​Aorta​​ ​All​ ​Rights​ ​Reserved

contributes​ ​60%​ ​of​ ​the​ ​blood​ ​return.​ ​Apart​ ​from​ ​this,​ ​one​ ​major​ ​route​ ​of​ ​blood​ ​return​ ​is​ ​the Coronary​ ​Sinus​ ​(CS),​ ​which​ ​returns​ ​blood​ ​from​ ​the​ ​veins​ ​of​ ​heart​ ​itself.

Left​ ​Atrium​ ​receives​ ​pure​ ​blood​ ​from​ ​the​ ​lungs​ ​via​ ​4​ ​pulmonary​ ​veins.​ ​Two​ ​on​ ​Right​ ​(Right Superior​ ​and​ ​Inferior​ ​pulmonary​ ​veins)​ ​and​ ​two​ ​on​ ​the​ ​left​ ​(Left​ ​Superior​ ​and​ ​Inferior​ ​pulmonary veins).

The​ ​right​ ​ventricle​ ​pumps​ ​its​ ​blood​ ​into​ ​large​ ​pulmonary​ ​Artery​ ​while​ ​left​ ​ventricle​ ​ejects​ ​into Aorta-​ ​the​ ​biggest​ ​artery​ ​in​ ​the​ ​body.

Coronary​ ​Arteries Heart​ ​muscles​ ​too​ ​require​ ​oxygenated​ ​blood,​ ​which​ ​is​ ​supplied​ ​through​ ​Coronary​ ​arteries​ ​which are​ ​the​ ​first​ ​two​ ​branches​ ​of​ ​aorta.​ ​These​ ​are​ ​Left​ ​(LCA)​ ​and​ ​Right​ ​(RCA)​ ​coronary​ ​arteries.

The​ ​left​ ​Coronary​ ​Artery​ ​after​ ​a​ ​short​ ​broad​ ​stem​ ​(Left​ ​main​ ​artery)​ ​divides​ ​into​ ​two​ ​major branches-​ ​Left​ ​Anterior​ ​Descending​ ​Artery​ ​(LAD)​ ​which​ ​supplies​ ​the​ ​front​ ​of​ ​heart​ ​and interventricular​ ​Septum​ ​(IVS)​ ​and​ ​Left​ ​Circumflex​ ​Artery​ ​(LCA)​ ​which​ ​supplies​ ​the​ ​lateral​ ​and

©​ ​2017​ ​Heart​ ​and​ ​Aorta​​ ​All​ ​Rights​ ​Reserved

posterior​ ​part​ ​of​ ​the​ ​left​ ​ventricle.​ ​Right​ ​Coronary​ ​Artery​ ​mainly​ ​supplies​ ​the​ ​Right​ ​Ventricle, Inferior​ ​(lower)​ ​part​ ​of​ ​the​ ​Left​ ​ventricle​ ​and​ ​part​ ​of​ ​IVS.

How​ ​Heart​ ​Beats​ ​Regularly?

Have​ ​you​ ​ever​ ​wondered​ ​what​ ​makes​ ​our​ ​heart​ ​beat​ ​so​ ​efficiently​ ​and​ ​regularly?

What​ ​decides​ ​rhythm​ ​of​ ​heart?

The​ ​secret​ ​is​ ​the​ ​internal​ ​pacemaker​ ​(timer)​ ​and​ ​the​ ​conducting​ ​system​ ​of​ ​the​ ​heart​ ​(Electrical circuit).

©​ ​2017​ ​Heart​ ​and​ ​Aorta​​ ​All​ ​Rights​ ​Reserved

The​ ​natural​ ​pacemaker​ ​is​ ​situated​ ​at​ ​the​ ​junction​ ​of​ ​Right​ ​Atrium​ ​and​ ​SVC.​ ​It​ ​is​ ​called​ ​SA​ ​note.

There​ ​is​ ​a​ ​network​ ​of​ ​special​ ​fibres​ ​starting​ ​from​ ​the​ ​pacemaker​ ​and​ ​going​ ​all​ ​over​ ​the​ ​heart muscles.​ ​This​ ​is​ ​called​ ​the​ ​conduction​ ​system.​ ​The​ ​pacemaker​ ​is​ ​capable​ ​of​ ​producing​ ​regular stimuli​ ​of​ ​electrical​ ​activity​ ​which​ ​travels​ ​along​ ​the​ ​conduction​ ​system​ ​to​ ​the​ ​entire​ ​heart​ ​making the​ ​muscles​ ​contract.

©​ ​2017​ ​Heart​ ​and​ ​Aorta​​ ​All​ ​Rights​ ​Reserved