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Pulse ox was 80%, hr 120, Bp 220/110, ventilation rate of 38. This is a descriptive report of the management techniques used effectively in the emergency department (ED) treatment of acute congestive heart failure (CHF) in renal dialysis patients. Their beneficial effects in this disease results from their ability to reduce preload and afterload of the heart muscle leading to an increase of cardiac index, a decrease in mean pulmonary artery and wedge pressures as well as pulmonary and peripheral vascular resistances. ).Treatment algorithms suggested by recent ESC guidelines recommend the administration of diuretics to all patients with congestion and the addition of vasodilators (e.g., IV nitrates) if SBP is >110 mmHg. They foundthigher doses were more effective at decreasing intubation (13.8 versus 26.7 %) and intensive care unit (ICU) admissions (37.9 versus 80.0 %) compared with non-high-dose nitroglycerin. While this study demonstrated that nitrates are not extremely effective in improving haemodynamics or AHF symptoms, the major criticism is that they tested low, but commonly used, IV nitroglycerin doses, i.e.
Recent attempts to improve our knowledge base by examining the effects of such therapies in small, underpowered studies only add to this lack of certainty by reporting mostly equivalent results within wide confidence intervals. Overall, treatment with IV nitrates is not adherent to guideline recommendations, and the authors suggest the variation in clinical practice may be the result of a lack of large randomised controlled trial evidence.The lack of quality research to support guidelines has been discussed by others: Cotter et al., in 2014, stated “despite a generation of clinical research we continue to treat patients with AHF with iv therapies during the first days of admission based on little or no evidence. While organic nitrates are among the oldest treatments for chronic stable angina, they are underutilised in AHF. They concluded that adding a high-dose nitrate strategy to standard therapy accelerates cardiac recovery and was a notably safe strategy. Hence, our clinical practice continues to be uninformed and we may very well be under treating patients by denying them effective therapies simply because we do not know they if are effective or administering therapies that cause harm because we do not know they do cause harm.”Physicians have a long-term familiarity with nitrates as they have been used in ischaemic heart disease for years, with well-described side effects. Acute congestive heart failure (CHF) is one of the most common syndromes encountered in emergency care settings. The VMAC study reported headache (in 20 %) and symptomatic hypotension in 5 % as the most common adverse events during the first 24 hours after start of nitroglycerin therapy.The physiology of nitrate tolerance is still unclear. In a recent review, Corstiaan et al, proposed the more aggressive use of nitrates and a more conservative use of inotropes in AHF patients with normal or high BP. This is supported by the knowledge of their mechanism of action given the unique combination of microvascular and haemodynamic effects. In the high-dose group, a rapid and profound decrease in BP occurred, but without an associated increase in adverse events.Finally, an ICU study of 40 severe AHF patients showed benefit from higher-dose nitrates. Unable to load your delegates due to an error
Presentation classifications for these patients were minimal distress (13 patients), moderate distress (16 patients), and severe distress (17 patients). Patients were randomised to receive either low-dose IV furosemide (40 mg) and high-dose IV isosorbide dinitrate (3,000 mcg) every 5 minutes, or 1 mg/hour of isosorbide dinitrite (ISDN) that was increased every 10 minutes by 1 mg/hour with and high-dose IV furosemide bolus 80 mg repeated every 15 minutes. Study design included a prospective case series of consecutive renal dialysis patients who presented to the ED of a regional dialysis center in acute CHF. [(1)][1] to the demonstration of I initiated CPAP, ran a 12 lead, and started a nitro infusion. Comparison of effects on left ventricular filling pressure of intravenous nesiritide and high-dose nitroglycerin in patients with decompensated heart failure. Within the last 40 years beta-blocker therapy status in chronic heart failure has changed from being the most hazardous drug to the most effective therapy.
Hit the Nitro There has been a lot of buzz about bolus IV nitroglycerin (NTG) for acute heart failure patients. Correct diagnosis and treatment for pulmonary edema, the most common acute manifestation of CHF, are of primary importance as misdiagnosis can … However, they also concluded that nitrates were associated with a lower incidence of adverse effects after 3 hours versus placebo, suggesting that the dose may have been inadequate. 1994 May;12(3):388. doi: 10.1016/0735-6757(94)90179-1.Am J Emerg Med. Unable to load your collection due to an error SL GTN (or nitro for you yanks).
Clay Smith. Publication Committee for the VMAC Investigators (Vasodilatation in the Management of Acute CHF).
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