Anatom3DLateral papillary muscle of left ventricle
Musculus papillaris lateralis ventriculi sinistri · Boční papilární sval levé komory
Muscles
Looks like
The front-outer (anterolateral) papillary muscle of the left ventricle, a thick finger of muscle tied to the mitral valve.
What it does
Holds the mitral valve flaps shut during each beat so blood goes forward, not back to the lungs.
Keeping it well
Has a double blood supply, so it ruptures less often after a heart attack than its partner; sudden breathlessness after one is an emergency.
Its parts
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