Editing Heart failure (section)

===Acute decompensation===
{{main|Acute decompensated heart failure}}
[[File:Kerley-B-Linien.jpg|thumb|[[Kerley B lines]] in [[radiograph]] of acute cardiac decompensation. The short, horizontal lines can be found everywhere in the [[right lung]].]]
Chronic stable heart failure may easily [[Decompensation|decompensate]] (fail to meet the body's metabolic needs). This most commonly results from a concurrent illness (such as [[myocardial infarction]] (a heart attack) or [[pneumonia]]), [[cardiac arrhythmia|abnormal heart rhythms]], uncontrolled [[hypertension]], or a person's failure to maintain a fluid restriction, diet, or medication.<ref name="OPTIMIZE-HF">{{cite journal | vauthors = Fonarow GC, Abraham WT, Albert NM, Stough WG, Gheorghiade M, Greenberg BH, O'Connor CM, Pieper K, Sun JL, Yancy CW, Young JB | title = Factors identified as precipitating hospital admissions for heart failure and clinical outcomes: findings from OPTIMIZE-HF | journal = Archives of Internal Medicine | volume = 168 | issue = 8 | pages = 847–54 | date = April 2008 | pmid = 18443260 | doi = 10.1001/archinte.168.8.847 | doi-access =  | s2cid = 20912905 }}</ref>

Other factors that may worsen CHF include: anemia, hyperthyroidism, excessive fluid or salt intake, and medication such as [[Non-steroidal anti-inflammatory drug|NSAIDs]] and [[thiazolidinedione]]s.<ref>{{cite journal | vauthors = Nieminen MS, Böhm M, Cowie MR, Drexler H, Filippatos GS, Jondeau G, Hasin Y, Lopez-Sendon J, Mebazaa A, Metra M, Rhodes A, Swedberg K, Priori SG, Garcia MA, Blanc JJ, Budaj A, Cowie MR, Dean V, Deckers J, Burgos EF, Lekakis J, Lindahl B, Mazzotta G, Morais J, Oto A, Smiseth OA, Garcia MA, Dickstein K, Albuquerque A, Conthe P, Crespo-Leiro M, Ferrari R, Follath F, Gavazzi A, Janssens U, Komajda M, Morais J, Moreno R, Singer M, Singh S, Tendera M, Thygesen K | title = Executive summary of the guidelines on the diagnosis and treatment of acute heart failure: the Task Force on Acute Heart Failure of the European Society of Cardiology | journal = European Heart Journal | volume = 26 | issue = 4 | pages = 384–416 | date = February 2005 | pmid = 15681577 | doi = 10.1093/eurheartj/ehi044 | url = http://repositorio.chporto.pt/bitstream/10400.16/493/1/pdf.4.pdf | doi-access = free | access-date = 18 September 2019 | archive-date = 10 August 2017 | archive-url = https://web.archive.org/web/20170810020623/http://repositorio.chporto.pt/bitstream/10400.16/493/1/pdf.4.pdf | url-status = live }}</ref> NSAIDs increase the risk twofold.<ref>{{cite journal | vauthors = Bhala N, Emberson J, Merhi A, Abramson S, Arber N, Baron JA, Bombardier C, Cannon C, Farkouh ME, FitzGerald GA, Goss P, Halls H, Hawk E, Hawkey C, Hennekens C, Hochberg M, Holland LE, Kearney PM, Laine L, Lanas A, Lance P, Laupacis A, Oates J, Patrono C, Schnitzer TJ, Solomon S, Tugwell P, Wilson K, Wittes J, Baigent C | title = Vascular and upper gastrointestinal effects of non-steroidal anti-inflammatory drugs: meta-analyses of individual participant data from randomised trials | journal = Lancet | volume = 382 | issue = 9894 | pages = 769–79 | date = August 2013 | pmid = 23726390 | pmc = 3778977 | doi = 10.1016/S0140-6736(13)60900-9 }}</ref>