Systole
Systole /ˈsɪstəliː/ is the part of the cardiac cycle when the ventricles contract. The term "systole" originates from New Latin, from Ancient Greek συστολή (sustolē), from συστέλλειν (sustellein, "to contract"), from σύν (syn, "together") + στέλλειν (stellein, "send").
The mammalian heart has 4 chambers: the left atrium, the left ventricle, the right atrium and the right ventricle.
When the smaller, upper atria chambers contract in late diastole, they send blood down to the larger, lower ventricle chambers. When the lower chambers are filled and the valves to the atria are closed, the ventricles undergo isovolumetric contraction (contraction of the ventricles while all valves are closed), marking the first stage of systole. The second phase of systole sends blood from the left ventricle to the aorta and body extremities, and from the right ventricle to the lungs. Thus, the atria and ventricles contract in alternating sequence. The left and right atria feed blood, at the same time, into the ventricles. Then, the left and right ventricles contract simultaneously as well.
Systole (disambiguation)
Systole may refer to:
- In mathematics, Systoles of surfaces are systolic inequalities for curves on surfaces
Systolic geometry
In mathematics, systolic geometry is the study of systolic invariants of manifolds and polyhedra, as initially conceived by Charles Loewner and developed by Mikhail Gromov, Michael Freedman, Peter Sarnak, Mikhail Katz, Larry Guth, and others, in its arithmetical, ergodic, and topological manifestations. See also a slower-paced Introduction to systolic geometry.
The notion of systole
The systole of a compact metric space X is a metric invariant of X, defined to be the least length of a noncontractible loop in X (i.e. a loop that cannot be contracted to a point in the ambient space X). In more technical language, we minimize length over free loops representing nontrivial conjugacy classes in the fundamental group of X. When X is a graph, the invariant is usually referred to as the girth, ever since the 1947 article on girth by W. T. Tutte. Possibly inspired by Tutte's article, Loewner started thinking about systolic questions on surfaces in the late 1940s, resulting in a 1950 thesis by his student Pao Ming Pu. The actual term "systole" itself was not coined until a quarter century later, by Marcel Berger.
Podcasts:
Systole
ALBUMS
- Miasma CD, Volume 3 released: 2005
Miasma CD, Volume 3
Released 2005- Eaten by Rats (Fuck Off version)
- Life Is Done With Me
- Minun Aikani
- Societatis Draconistrarum
- Memories of War
- When the Blackened Candles Shine
- Hollow Display of Chaos
- Down the Drain
- I Devour
- The Eyes That Have Seen Everything
- This Is Going to Hurt
- Evil Ego
- Spiral Madness
- Love of Sorrow
- Defenceless Prey
- Obsession
- Mental Imprisonment
- Where All Roads Lead To
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by Manic Street Preachers
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by D.O.A
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by Shawn Colvin
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by Colony 5
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by Ablaze My Sorrow
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by Bliss
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by April Sixth
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by Blindead
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by Mozez
Suicide Alley
by: Manic Street PreachersI'm going down to suicide alley
'Cos the air that I breathe tastes better down there
I'm going down to suicide alley
'Cos it seems as if, as if it's the only place for me
And I'm going down to suicide alley
Where you can't get at me
And I'm going down to suicide alley
Where I can be what I want to be
I'm going down to suicide alley
'Cos the air that I breathe tastes better down there
I'm going down to suicide alley
'Cos it seems as if, as if it's the only place for me
And I'm going down to suicide alley
Where you can't get at me
And I'm going down to suicide alley
Where I can be what I want to be
You won't eat away at my mind with your ideas of decency
I'll be in suicide alley being who and what I want to be
You won't eat away at my mind with your ideas of decency