¼±Åà - È­»ìǥŰ/¿£ÅÍŰ ´Ý±â - ESC

 
"circulatory collapse"¿¡ ´ëÇÑ °Ë»ö °á°úÀÔ´Ï´Ù. °Ë»ö °á°ú º¸´Â µµÁß¿¡ Tab ۸¦ ´©¸£½Ã¸é °Ë»ö âÀÌ ¼±Åõ˴ϴÙ.
´ëÇÑÀÇÇù ÀÇÇпë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 1 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
  • circulatory collapse
    ¼øÈ¯ÇãÅ»
´ëÇÑÀÇÇù ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 15 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
  • circulatory
    ¼øÈ¯-
  • circulatory arrest
    ¼øÈ¯Á¤Áö
  • circulatory congestion
    ¼øÈ¯¿ïÇ÷
  • circulatory failure
    ¼øÈ¯±â´É»ó½Ç, ¼øÈ¯ºÎÀü
  • circulatory shock
    ¼øÈ¯¼îÅ©
  • circulatory system
    ¼øÈ¯°èÅë, ¼øÈ¯°è
  • collapse
    1. ÇãÅ» 2. ºØ±«
  • cardiovascular collapse
    ½É(Àå)Ç÷°üÇãÅ»
  • diabetic collapse
    ´ç´¢º´ÇãÅ»
  • diastolic collapse
    È®Àå±âÇãÅ»
  • heat collapse
    ¿­ÇãÅ»
  • neurocirculatory collapse
    ½Å°æ¼øÈ¯ÇãÅ»
  • systolic collapse
    ¼öÃà±âÇãÅ»
  • segmental collapse
    ±¸¿ªÇãÅ»
  • vasomotor collapse
    Ç÷°ü¿îµ¿ÇãÅ»
´ëÇÑÀÇÇù Çʼö ÀÇÇпë¾îÁý »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 1 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
  • collapse
    ÇãÅ»
¿¾ ´ëÇÑÀÇÇù ÀÇÇпë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 1 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
  • circulatory collapse
    ¼øÈ¯ÇãÅ»
¿¾ ´ëÇÑÀÇÇù ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 15 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
  • circulatory arrest
    ¼øÈ¯Á¤Áö
  • circulatory
    ¼øÈ¯-
  • circulatory congestion
    ¼øÈ¯¿ïÇ÷
  • circulatory diffusion
    ¼øÈ¯È®»ê
  • circulatory failure
    ¼øÈ¯±â´É»ó½Ç, ¼øÈ¯ºÎÀü
  • circulatory shock
    ¼øÈ¯¼îÅ©
  • circulatory system
    ¼øÈ¯°èÅë
  • hyperkinetic circulatory state
    ¿îµ¿°ú´Ù¼øÈ¯»óÅÂ
  • collapse
    ÇãÅ»
  • cardiovascular collapse
    ½ÉÀåÇ÷°üÇãÅ»
  • diabetic collapse
    ´ç´¢º´ÇãÅ»
  • diastolic collapse
    È®Àå±âÇãÅ»
  • heat collapse
    ¿­ÇãÅ»
  • neurocirculatory collapse
    ½Å°æ¼øÈ¯ÇãÅ»
  • segmental collapse
    ±¸¿ªÇãÅ»
¿¾ ´ëÇÑÀÇÇù 2 ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 6 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
  • hyperkinetic circulatory state
    ¿îµ¿°úÀ×¼º ¼øÈ¯»óÅÂ(¡­âàü»ßÒ÷¾).
  • hyperkinetic circulatory state
    °ú¿îµ¿¼º ¼øÈ¯»óÅÂ(¡­âàü»ßÒ÷¾).
  • heat collapse
    ¿­ÇãÅ»(Ëç̴̬).
  • heat collapse
    ¿­ÇãÅ»(æðúÈ÷­).
  • pulmonary collapse
    ÆóÇãÅ»(øËúÈ÷­).
  • pulmonary collapse
    ÆóÇãÅ»(øËúÈ÷­)
¿¾ ´ëÇÑÀÇÇù 3 ÀÇÇпë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 1 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
  • circulatory collapse
    ¼øÈ¯ÇãÅ»(¡­úÈ÷­).
¿¾ ´ëÇÑÀÇÇù 3 ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 15 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
  • cardiovascular collapse ; circulatory collapse
    ½ÉÇ÷°üÇãÅ» ; ¼øÈ¯ÇãÅ»(âàü»úÈ÷­).
  • circulatory
    ¼øÈ¯(âàü»)ÀÇ.
  • circulatory arrest
    ¼øÈ¯ Á¤Áö(âàü»ïÎò­)
  • circulatory arrest, deep hypothermia
    ¼øÈ¯Á¤Áö, ½É(ä¢)Àú¿Â
  • circulatory asthenia
    ¼øÈ¯¹«·ÂÁõ(âàü»Ùíæ³ñø).
  • circulatory congestion
    ¼øÈ¯¿ïÇ÷(¡­ê¦úì).
  • circulatory diffusion
    ¼øÈ¯È®»ê(¡­üªß¤) ¡ì¿ëÇØ¹ý(éÁú°Ûö)¡í.
  • circulatory failure
    ¼øÈ¯ºÎÀü(¡­ÝÕîï).
  • circulatory hypoxia
    ¼øÈ¯¼º Àú»ê¼ÒÁõ(âàü»àõî¸ß«áÈñø).
  • circulatory optic atrophy
    ÇãÇ÷½Ã½Å°æÀ§Ãà
  • circulatory overload
    ¼øÈ¯(·®)°úºÎÇÏ.
  • circulatory overload
    ¼øÈ¯(·®) °úºÎÇÏ
  • circulatory shock
    ¼øÈ¯¼º(âàü»àõ) ¼ï
  • circulatory shock
    ¼øÈ¯¼º ¼ï.
  • circulatory system
    ¼øÈ¯°è(âàü»Í§)
KI ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 4 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
  • circulatory
    ¼øÈ¯ÀÇ
  • collapse
    ÇãÅ»
  • segmental collapse
    ±¸¿ª¼ºÇãÅ»
  • vascular collapse
    Ç÷°üÇãÅ»
KMLE ÀÇÇоà¾î »çÀü À¯»ç °Ë»ö °á°ú : 5 ÆäÀÌÁö: 1
JVP [POMD P 49 - 52]
  1) Jugular Vein Pressure
  2) Jugular Venous Pulse
...
CC calcaneal-cuboid; calcium cyclamate; cardiac catheterization; cardiac contusion; cardiac cycle; card...
RVDC right ventricular diastolic collapse
SLAC scapholunate advanced collapse [wrist]
CGP N-carbobenzoxy-glycyl-L-phenylalanine; chorionic growth hormone-prolactin; choline glycerophosphatid...
KMLE ÀÚµ¿ÃßÃâ ÀÇÇоà¾î »çÀü À¯»ç °Ë»ö °á°ú : 5 ÆäÀÌÁö: 1
CA Circulatory arrest
DHCA Deep hypothermic circulatory arrest
HCA Hypothermic circulatory arrest
MCFP Mean circulatory filling pressure
MCP mean circulatory pressure
°æºÏ´ë Ä¡°ú´ëÇÐ ±¸°­³»°ú ±³½Ç »çÀü ¸ÂÃã °Ë»ö °á°ú : 1 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
    ¼³¸í
  • circulatory collapse
    ½ÉÇ÷°ü ÇãÅ», ¼øÈ¯ ÇãÅ»
°æºÏ´ë Ä¡°ú´ëÇÐ ±¸°­³»°ú ±³½Ç »çÀü À¯»ç °Ë»ö °á°ú : 6 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
    ¼³¸í
  • circulatory failure
    ¼øÈ¯ ºÎÀü
  • circulatory shock
    ¼øÈ¯¼º ¼ï
  • cardiovascular collapse
    ½É Ç÷°ü ÇãÅ», ¼øÈ¯ ÇãÅ»
  • collapse
    ÇãÅ», ÇùÂø
    1. ¼øÈ¯ ºÎÀüÀ» ¼ö¹ÝÇÑ ±ØµµÀÇ Çǰï°ú ¾ï¾Ð »óÅÂ. 2. ½Åü °¢ ºÎ ¶Ç´Â ±â°ü º®ÀÇ ºñÁ¤»óÀû ÇÔÀÔ.
  • posterior bite collapse
    ¼öÁ÷ ±³ÇÕ °í°æ »ó½Ç
  • pulmonary collapse
    Æó ÇãÅ»
CancerWEB ¿µ¿µ ÀÇÇлçÀü ¸ÂÃã °Ë»ö °á°ú : 1 ÆäÀÌÁö: 1
circulatory collapse Failure of the circulation, either cardiac or peripheral.
(05 Mar 2000)
CancerWEB ¿µ¿µ ÀÇÇлçÀü À¯»ç °Ë»ö °á°ú : 13 ÆäÀÌÁö: 1
circulatory Having to do with the circulation, the movement of fluid in a regular or circuitous course. Although the adjective circulatory need not necessarily refer to the circulation of the blood, for all practical purposes today it does. A circulatory problem is taken usually to be a problem with the blood circulation, for example with heart failure.
(12 Dec 1998)
circulatory and respiratory physiology Functions and activities of cardiovascular circulation and of respiration and respiratory mechanics.
(12 Dec 1998)
circulatory arrest Cessation of the circulation of blood as a result of ventricular standstill or fibrillation.
(05 Mar 2000)
circulatory system The circulatory system is a composed of the heart, arteries, capillaries and veins. It serves to transport blood low in oxygen from the body to the lungs and heart (veins) and oxygenated blood from the lungs and heart throughout the body (arteries). (see heart, blood).
(12 Dec 1998)
absorption collapse Pulmonary collapse due to rapid complete obstruction of a large bronchus.
(05 Mar 2000)
massive collapse Relatively sudden atelectasis of an entire lung or of a lobe.
(05 Mar 2000)
growth cone collapse <cell biology> Loss of motile activity and cessation of advance by growth cones. There are now thought to be specific molecules that inhibit the motility of particular growth cones and are important in establishing correct pathways in developing nervous systems.
See: axon pathfinding.
(18 Nov 1997)
collapse 1. A state of extreme prostration and depression, with failure of circulation.
2. Abnormal falling in of the walls of any part of organ.
Origin: L. Collapsus
(18 Nov 1997)
collapse delirium Delirium caused by extreme physical depression induced by a shock, profuse haemorrhage, exhausting labour, etc.
(05 Mar 2000)
collapse of dental arch Movement of teeth to fill a space which would normally be filled by another, missing tooth, creating a malpositioning of adjacent and opposing teeth.
(05 Mar 2000)
collapse therapy Surgical treatment of pulmonary tuberculosis whereby the lung is totally or partially, temporarily or permanently, immobilised. The procedure was based on the popular concept that collapsing the affected portion of a tuberculous lung allowed the infected area to rest and thereby recover. at the beginning of the 20th century artificially induced pneumothorax (pneumothorax, artificial) was popular. Later a variety of other techniques was used to encourage collapse of the infected portion of the lung: unilateral phrenic nerve division, pneumonolysis, pneumoperitoneum (pneumoperitoneum, artificial), and thoracoplasty. Collapse therapy has declined since the advent of antitubercular chemotherapy.
(12 Dec 1998)
pressure collapse Pulmonary collapse due to external compression of the lung, as by a pleural effusion or pneumothorax.
(05 Mar 2000)
pulmonary collapse Secondary atelectasis due to bronchial obstruction, pleural effusion or pneumothorax, cardiac hypertrophy, or enlargement of other structures adjacent to the lungs.
(05 Mar 2000)
KMLE À¥ ¿ë¾î ¸ÂÃã °Ë»ö °á°ú : 1 ÆäÀÌÁö: 1
circulatory collapse shock; circulatory insufficiency without congestive heart failure.
Ãâó: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
ÇÑ¿µ/¿µÇÑ »çÀü À¯»ç °Ë»ö °á°ú : 6 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
  • circulatory
    ¼øÈ¯ÀÇ
  • collapse
    ¹«³ÊÁö´Ù
  • circulatory
    (ƯÈ÷ Ç÷¾×ÀÇ)¼øÈ¯»óÀÇ
  • circulatory system
    ¼øÈ¯°è(Ç÷¾×À̳ª ¸²ÇÁ¾×ÀÌ È帣°Ô ÇÏ´Â)
  • collapse
    (°Ç¹°µîÀÌ)¹«³ÊÁö´Ù;ÁÂÀýÇÏ´Ù;¼è¾àÇØÁö´Ù;Æø¶ôÇÏ´Ù;(Ã¥»ó.ÀÇÀÚ µîÀÌ)Á¢¾îÁö´Ù;(ÆóµîÀÌ)ÇãÅ»ÇÏ´Ù;¹«³Ê¶ß¸®´Ù;ºØ±«½ÃŰ´Ù;(±â±¸¸¦)Á¢´Ù;(Æó µîÀ»)ÇãÅ»ÄÉÇÏ´Ù;¹«³ÊÁü;¿ÍÇØ;(³»°¢,ÀºÇà µîÀÇ)ºØ±«;(Èñ¸Á.°èȹ µîÀÇ)ÁÂÀý;(°Ç°­µîÀÇ)¼è¾à;ÇãÅ»;ÀDZâ¼Òħ
  • gravitational collapse
    Áß·Â ºØ±«(õü°¡ Áß·Â ÀÛ¿ëÀ¸·Î ¼öÃàÇØ °¡´Â Çö»ó)
ÀÌ ¾Æ·¡ ºÎÅÍ´Â °á°ú°¡ ¾ø½À´Ï´Ù.
KMLE ¾àǰ/ÀǾàǰ ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
  • Á¦Ç°¸í
    ¼ººÐ/ÇÔ·®
    ±¸ºÐ/º¸Çè±Þ¿©
KMLE ¾àǰ/ÀǾàǰ À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
  • Á¦Ç°¸í
    ¼ººÐ/ÇÔ·®
    ±¸ºÐ/º¸Çè±Þ¿©
¾Ë±â½¬¿î ÀÇÇпë¾îÇ®ÀÌÁý, ¼­¿ïÀÇ´ë ±³¼ö ÁöÁ¦±Ù, °í·ÁÀÇÇÐ ÃâÆÇ ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
¾Ë±â½¬¿î ÀÇÇпë¾îÇ®ÀÌÁý, ¼­¿ïÀÇ´ë ±³¼ö ÁöÁ¦±Ù, °í·ÁÀÇÇÐ ÃâÆÇ À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
´ëÇÑÀÇÇù Çʼö ÀÇÇпë¾îÁý »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
¿¾ ´ëÇÑÀÇÇù 2 ÀÇÇпë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
´ëÇÑÇØºÎÇÐȸ ÀÇÇпë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
´ëÇÑÇØºÎÇÐȸ ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
´ëÇѽŰæ¿Ü°úÇÐȸ ÀÇÇпë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
    ÇÑÀÚ
´ëÇѽŰæ¿Ü°úÇÐȸ ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
    ÇÑÀÚ
´ëÇѱâ»ýÃæÇÐȸ ÀÇÇпë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
´ëÇѱâ»ýÃæÇÐȸ ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
´ëÇÑ»ýÈ­ÇкÐÀÚ»ý¹°ÇÐȸ ¿ë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
´ëÇÑ»ýÈ­ÇкÐÀÚ»ý¹°ÇÐȸ ¿ë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
KI ÀÇÇпë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
KMLE ÀÇÇоà¾î »çÀü ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
KMLE ÀÚµ¿ÃßÃâ ÀÇÇоà¾î »çÀü ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
ÀÇÇÐ³í¹® ¾àÀÚ(Pubmed/Entrez) °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
Çѱ¹Ç¥ÁØÁúº´»çÀκзù ¾àÀÚ ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
  • ÄÚµå
    ¿µ¹®
    ÇѱÛ
Çѱ¹Ç¥ÁØÁúº´»çÀκзù ¾àÀÚ À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
  • ÄÚµå
    ¿µ¹®
    ÇѱÛ
MeSH(Medical Subject Headings) ¸ÂÃã °Ë»ö (http://www.nlm.nih.gov) °á°ú : 0 ÆäÀÌÁö: 1
MeSH(Medical Subject Headings) À¯»ç °Ë»ö (http://www.nlm.nih.gov) °á°ú : 0 ÆäÀÌÁö: 1
¿ÜºÎ ¸µÅ© - Merriam-Webster's ÀÇÇлçÀü ¸ÂÃã °Ë»ö (https://www.merriam-webster.com) °á°ú: 0 ÆäÀÌÁö: 1
¿ÜºÎ ¸µÅ© - Merriam-Webster's ÀÇÇлçÀü À¯»ç °Ë»ö (https://www.merriam-webster.com) °á°ú: 0 ÆäÀÌÁö: 1
¿ÜºÎ ¸µÅ© - A.D.A.M. Medical Encyclopedia ¸ÂÃã °Ë»ö (http://www.nlm.nih.gov) °á°ú: 0 ÆäÀÌÁö: 1
¿ÜºÎ ¸µÅ© - A.D.A.M. Medical Encyclopedia À¯»ç °Ë»ö (http://www.nlm.nih.gov) °á°ú: 0 ÆäÀÌÁö: 1
¿ÜºÎ ¸µÅ© - MedlinePlus Health Topics ¸ÂÃã °Ë»ö (http://www.nlm.nih.gov) °á°ú: 0 ÆäÀÌÁö: 1
¿ÜºÎ ¸µÅ© - MedlinePlus Health Topics À¯»ç °Ë»ö (http://www.nlm.nih.gov) °á°ú: 0 ÆäÀÌÁö: 1
¿ÜºÎ ¸µÅ© - µå·¯±×ÀÎÆ÷ ¾àÇÐ Á¤º¸ ¸ÂÃã °Ë»ö (http://www.druginfo.co.kr) °á°ú: 0 ÆäÀÌÁö: 1
Á¦Ç°¸í
ÆÇ¸Å»ç
º¸ÇèÄÚµå ¼ººÐ/ÇÔ·®
±¸ºÐ/º¸Çè±Þ¿©
¿ÜºÎ ¸µÅ© - µå·¯±×ÀÎÆ÷ ¾àÇÐ Á¤º¸ À¯»ç °Ë»ö (http://www.druginfo.co.kr) °á°ú: 0 ÆäÀÌÁö: 1
Á¦Ç°¸í
ÆÇ¸Å»ç
º¸ÇèÄÚµå ¼ººÐ/ÇÔ·®
±¸ºÐ/º¸Çè±Þ¿©
¿ÜºÎ ¸µÅ© - WebMD.com Drug Reference ¸ÂÃã °Ë»ö (http://www.webmd.com) °á°ú: 0 ÆäÀÌÁö: 1
¿ÜºÎ ¸µÅ© - WebMD.com Drug Reference À¯»ç °Ë»ö (http://www.webmd.com) °á°ú: 0 ÆäÀÌÁö: 1
¿ÜºÎ ¸µÅ© - Drug.com Drugs by Medical Condition ¸ÂÃã °Ë»ö (http://www.drugs.com) °á°ú: 0 ÆäÀÌÁö: 1
¿ÜºÎ ¸µÅ© - Drug.com Drugs by Medical Condition À¯»ç °Ë»ö (http://www.drugs.com) °á°ú: 0 ÆäÀÌÁö: 1
KMLE À¥ ¿ë¾î À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
ÇÑ¿µ/¿µÇÑ »çÀü ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
  • ¿µ¹®
    ÇѱÛ
WordNet ÀÏ¹Ý ¿µ¿µ »çÀü °Ë»ö °á°ú : 0 ÆäÀÌÁö: 1
¿ÜºÎ ¸µÅ© - American Heritage Dictionary ¿µ¿µ»çÀü ¸ÂÃã °Ë»ö (https://www.ahdictionary.com) °á°ú: 0 ÆäÀÌÁö: 1
¿ÜºÎ ¸µÅ© - American Heritage Dictionary ¿µ¿µ»çÀü À¯»ç °Ë»ö (https://www.ahdictionary.com) °á°ú: 0 ÆäÀÌÁö: 1
ÅëÇÕ°Ë»ö ¿Ï·á