Periodic Breathing — Different Loop Gain Phenotypes in Patients With Chronic Systolic Heart Failure and Periodic Breathing
Citation(s)
Brack T, Randerath W, Bloch KE Cheyne-Stokes respiration in patients with heart failure: prevalence, causes, consequences and treatments. Respiration. 2012;83(2):165-76. doi: 10.1159/000331457. Epub 2011 Oct 18.
Javaheri S, Shukla R, Zeigler H, Wexler L Central sleep apnea, right ventricular dysfunction, and low diastolic blood pressure are predictors of mortality in systolic heart failure. J Am Coll Cardiol. 2007 May 22;49(20):2028-34. doi: 10.1016/j.jacc.2007.01.084. Epub 2007 May 4.
Kasai T, Floras JS, Bradley TD Sleep apnea and cardiovascular disease: a bidirectional relationship. Circulation. 2012 Sep 18;126(12):1495-510. doi: 10.1161/CIRCULATIONAHA.111.070813. No abstract available.
Khoo VS MRI--"magic radiotherapy imaging" for treatment planning? Br J Radiol. 2000 Mar;73(867):229-33. doi: 10.1259/bjr.73.867.10817036. No abstract available.
Naughton MT Epidemiology of central sleep apnoea in heart failure. Int J Cardiol. 2016 Mar;206 Suppl:S4-7. doi: 10.1016/j.ijcard.2016.02.125. Epub 2016 Feb 26.
Naughton MT Loop gain in apnea: gaining control or controlling the gain? Am J Respir Crit Care Med. 2010 Jan 15;181(2):103-5. doi: 10.1164/rccm.200909-1449ED. No abstract available.
Rowley JA, Badr MS Central Sleep Apnea in Patients with Congestive Heart Failure. Sleep Med Clin. 2017 Jun;12(2):221-227. doi: 10.1016/j.jsmc.2017.03.001.
Wellman A, Malhotra A, Fogel RB, Edwards JK, Schory K, White DP Respiratory system loop gain in normal men and women measured with proportional-assist ventilation. J Appl Physiol (1985). 2003 Jan;94(1):205-12. doi: 10.1152/japplphysiol.00585.2002. Epub 2002 Sep 20.
Yumino D, Bradley TD Central sleep apnea and Cheyne-Stokes respiration. Proc Am Thorac Soc. 2008 Feb 15;5(2):226-36. doi: 10.1513/pats.200708-129MG.
Different Loop Gain Phenotypes in Patients With Chronic Systolic Heart Failure and Periodic Breathing
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
