Myocardial zone 12

Looks like

Segment 12 of the standard 17-part heart map: the middle third of the front-outer (anterolateral) wall of the left ventricle.

What it does

Used by doctors to describe exactly where the wall moves poorly or lacks blood on scans.

Keeping it well

Usually fed by the circumflex or diagonal arteries; poor movement here points to a narrowed artery.

Related conditions

• 22q11.2 deletion syndrome (DiGeorge)
• Aortic stenosis
• Atrial flutter
• Botulism
• Cardiomyopathy (dilated, restrictive, arrhythmogenic)
• Chagas disease
• Congenital heart defects
• Coronary artery disease
• Diphtheria
• Down syndrome (trisomy 21)
• Eating disorders
• Extra heartbeats (ectopics and palpitations)
• Fainting (syncope)
• Fibromyalgia
• Frailty & falls in older age
• Friedreich's ataxia
• Heart failure
• Heat exhaustion & heatstroke
• Hypertrophic cardiomyopathy
• Hypothermia & frostbite
• Kawasaki disease
• Long QT syndrome
• Malnutrition & refeeding syndrome
• Muscular dystrophy
• Myocarditis
• Orthostatic hypotension & POTS
• Panic disorder
• Pericardial effusion & tamponade
• Pericarditis
• Polymyalgia rheumatica
• Rhabdomyolysis
• Sarcoma
• Sarcopenia
• Shock (circulatory failure)
• Sudden cardiac arrest
• Sudden infant death syndrome
• Supraventricular tachycardia
• Takotsubo (stress) cardiomyopathy
• Tetanus
• Tuberous sclerosis complex
• Wolff–Parkinson–White syndrome