Management of the Decompensated Cirrhotic Patient with HCV
Sakib K. Khalid, M.D.
Guadalupe Garcia-Tsao. M.D
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Cirrhosis represents the end-stage of any chronic liver disease. The hepatitis C
virus (HCV), along with alcohol, is a leading cause of cirrhosis in the United
States. Cirrhosis leads to two major syndromes: portal hypertension and hepatic
insufficiency.
Additionally, peripheral and splanchnic vasodilatation with the resulting
hyperdynamic circulatory state is typical of cirrhosis and portal hypertension.
Cirrhosis can remain compensated for many years prior to the development of a
decompensating event. Decompensated cirrhosis is marked by the development of
any of the following complications: jaundice, variceal hemorrhage, ascites or
encephalopathy.
Jaundice results from hepatic insufficiency and, other than liver
transplantation, there is no specific therapy for this complication. It is
however important to recognize and treat superimposed entities (e.g., alcoholic
hepatitis, drug hepatotoxicity) that may contribute to the development of
jaundice. The other complications of cirrhosis occur as a consequence of portal
hypertension and/or hepatic insufficiency. Gastroesophageal varices result
almost solely from portal hypertension, although the hyperdynamic circulation
contributes to variceal growth and hemorrhage. Ascites results from sinusoidal
hypertension and sodium retention, which is, in turn, secondary to
vasodilatation and activation of neurohumoral systems. The hepatorenal syndrome
results from severe peripheral vasodilatation that leads to renal
vasoconstriction. Hepatic encephalopathy is a consequence of both portal
hypertension (shunting of blood through portosystemic collaterals) and hepatic
insufficiency.
Antiviral Therapy in HCV Decompensated Cirrhosis
There is limited published data regarding antiviral therapy in patients with
decompensated HCV cirrhosis. According to the 2002 NIH Consensus Conference
Statement, the primary therapy recommended for patients with decompensated liver
disease due to hepatitis C should be referral for liver transplantation [1].
Interferon and ribavirin therapy (the standard antiviral therapy for HCV) is
potentially dangerous in the setting of decompensated cirrhosis because of the
increased risk of life-threatening infections and the concern that treatment
might accelerate hepatic decompensation [2]. For these reasons, and due to
limited published literature, interferon therapy for patients with decompensated
cirrhosis due to HCV should be considered experimental and within the confines
of clinical trials [3]. However, the small percentage of patients with
decompensated cirrhosis who achieve a sustained virological response remain
virus-free post-transplantation, as opposed to universal recurrence of HCV
infection in those who are virus-positive pre-transplantation [4]. Therefore,
studies identifying the subgroup of patients with decompensated cirrhosis most
likely to benefit from therapy will be essential.
Management of Decompensating Events of Cirrhosis
Patients with decompensated cirrhosis should be referred for liver
transplantation. Until the time of transplant, therapy of the patient with
decompensated cirrhosis should focus on the management of each individual
decompensating event.
Acute variceal hemorrhage
Patients with cirrhosis who present with upper gastrointestinal hemorrhage
should have a diagnostic endoscopy performed to investigate the possibility of
variceal hemorrhage, as indicated by the presence of: active bleeding from a
varix, a "white nipple" overlying a varix, clots overlying a varix, or varices
with no other potential source of bleeding [5]. Bacterial infections occur
frequently in cirrhotic patients admitted with gastrointestinal hemorrhage and
the use of short-term (7 days) antibiotic prophylaxis has been shown to decrease
the rate of infections and to improve survival [6]. Although the recommended
antibiotic is norfloxacin administered orally at a dose of 400 mg twice a day
[7], equal efficacy has been observed with ciprofloxacin at a dose of 500 mg
orally twice a day [8]. In patients in whom it cannot be administered by mouth
or by nasogastric tube, systemic quinolones can be administered [9;10].
Endoscopic therapy, either sclerotherapy or variceal band ligation (VBL) is the
therapy of choice in the control of acute variceal hemorrhage [11], although it
has recently been suggested that pharmacological therapy (somatostatin,
terlipressin, octreotide) is as effective as endoscopic therapy [12]. The
association of pharmacological therapy, used as soon as the diagnosis is
suspected (even prior to endoscopy) and continued for 5 days after the diagnosis
is established, may represent the best approach to treatment [13]. However,
until the efficacy of somatostatin analogues is confirmed in ongoing trials, the
only pharmacological therapy available in the United States in the setting of
acute variceal hemorrhage is the combination of vasopressin and nitroglycerin
that can only be used for a maximum of 24 hours. Shunt surgery or the
transjugular intrahepatic portosystemic shunt (TIPS) is indicated in patients in
whom hemorrhage from esophageal varices cannot be controlled or in whom bleeding
recurs in spite of two sessions of endoscopic therapy (associated or not with
pharmacological therapy) [14]. In patients who bleed from gastric fundal
varices, failure of one sclerotherapy session should be enough to indicate the
performance of shunt therapy. Balloon tamponade should be limited to patients
with uncontrollable bleeding in whom a more definitive therapy (e.g., TIPS) is
being planned.
Prevention of recurrent variceal hemorrhage
Patients surviving an episode of acute variceal hemorrhage have a very high risk
of rebleeding and death. The median rebleeding rate in untreated individuals is
around 60% within one to two years from the index hemorrhage, with a mortality
of 33% [15]. Patients who have recovered from an episode of acute variceal
hemorrhage and who have had no evidence of hemorrhage for at least 24 hours and
in whom pharmacological therapy for the control of acute variceal hemorrhage has
been discontinued should be considered candidates for this prophylactic therapy.
Pharmacological therapy with a combination of ?-blockers and nitrates or
endoscopic therapy with VBL are effective therapies in the prevention of
variceal rebleeding. Both therapies appear to be equivalent and the choice will
depend on factors such as expertise, compliance, tolerance and patient
preference [16-18]. Notably, patients in whom portal pressure (as determined by
the hepatic venous pressure) can be reduced significantly with pharmacological
therapy have the lowest risk of rebleeding and the greatest survival benefit
[16]. In patients who re-bleed on pharmacological therapy or on EVL, the
combination of EVL and pharmacological therapy should be considered [19]. TIPS
is only indicated in patients in whom rebleeding recurs despite combined
endoscopic and pharmacological therapy. In patients who are surgical candidates,
shunt surgery can be considered even prior to TIPS in centers where the
expertise is available.
Management of spontaneous bacterial peritonitis (SBP)
SBP is an infection of ascites that occurs in the absence of a contiguous source
of infection (e.g., intestinal perforation, intraabdominal abscess). The
prevalence of SBP in hospitalized cirrhotic patients ranges between 10-30%. The
diagnosis should be suspected in any patient with ascites who develops local or
systemic signs of infection, encephalopathy or renal dysfunction and the
diagnosis confirmed with the presence of an ascites polymorphonuclear (PMN)
count
antibiotics, mainly cefotaxime or another third generation cephalosporin
(ceftriaxone, ceftazidime) or the combination of a b-lactam/b-lactamase such as
amoxicillin/clavulanic acid [7]. The intravenous preparation of
amoxicillin/clavulanate is not available in the United States and therefore the
combination of ampicillin/sulbactam could be used instead. In patients with
community-acquired SBP, no encephalopathy and a normal renal function, orally
administered quinolones with a high bioavailability (ofloxacin, levofloxacin)
are an acceptable alternative [20], provided that the local prevalence of
quinolone-resistant organisms is low. In patients with renal dysfunction, either
at baseline or during treatment, plasma expansion with albumin should be used as
an adjunct to therapy [21]. Treatment should be administered for a minimum of 5
days, preferably for 8 days. A control paracentesis performed 48 hours after
starting therapy is generally necessary to assess the response to therapy and
the need to modify antibiotic therapy and/or to initiate investigations to rule
out secondary peritonitis. In the presence of an obvious clinical improvement,
control paracentesis may not be necessary.
Prevention of recurrent SBP
In patients who survive an episode of SBP, the one-year cumulative recurrence
rate is high, at about 70%. It is therefore essential that patients that who
survive an episode of SBP be started on antibiotic prophylaxis to prevent
recurrence prior to discharge from the hospital. Long-term prophylaxis with oral
norfloxacin at a dose of 400 mg every day (or 250mg/day of ciprofloxacin
everyday) has been shown to be very effective in preventing recurrent SBP [22],
and is therefore indicated in patients who have recovered from an episode of
SBP. The once a week use of quinolones has been shown to be less effective and
to have a higher development of quinolone-resistant organisms compared to daily
norfloxacin [23] and is therefore not recommended. Prophylaxis should be
continuous until disappearance of ascites (i.e., patients with alcoholic
hepatitis) or transplant. In patients intolerant to quinolones (a rare event),
prophylactic therapy with trimethoprim/sulfamethoxazole can be recommended.
Long-term prophylaxis is currently not recommended in patients with ascites who
have never had SBP, independent of the presence or not of refractory ascites
and/or a low ascites protein content [7].
Management of ascites
Ascites is one of the most frequent complications of cirrhosis. In compensated
cirrhotic patients, ascites develops at a 5-year cumulative rate of about 30%.
Patients with new onset ascites and normal renal function, in whom spontaneous
bacterial peritonitis has been ruled out, should receive treatment with sodium
restriction and/or diuretics. Patients with a small amount of ascites and a
reasonable urinary sodium excretion (
restriction alone. Patients with moderate/tense ascites and avid sodium
retention should be treated with sodium restriction and diuretics. In patients
who decrease food intake because of the non-palatable salt-restricted diet, it
is preferable to liberalize sodium intake and implement measures to increase
sodium excretion through the use of diuretics, rather than to compromise
nutrition. The preferred diuretic schedule is to initiate therapy with
spironolactone alone at a single daily dose of 100 mg and to increase it in a
stepwise fashion to a maximum of 400 mg/day. If weight loss is not optimal or if
hyperkalemia develops, furosemide is then added at an initial single daily dose
of 40 mg, increased in a stepwise fashion to a maximum of 160 mg/day [24]. In
order to minimize the rate of complications, weight loss in patients without
edema should be maintained at a maximum of 1 lb/day (0.5 Kg/day), while in
patients with edema a weight loss of 2 lb/day (1 Kg/day) is allowable. In a
hospitalized patient with moderate/tense ascites in whom other complications
have been resolved, it is reasonable to initiate therapy with total paracentesis
with concomitant albumin infusion followed by the administration of diuretics,
as this will accelerate discharge from the hospital. Serial monitoring of
urinary sodium is unnecessary in patients who are responding adequately to
diuretics, as assessed by daily weights.
In cirrhotic patients with ascites who fail to respond to diuretics or who
present complications that preclude the administration of adequate doses of
these drugs (refractory ascites), repeated large volume paracenteses plus
intravenous albumin (LVP+A) is first choice. Albumin is infused at a dose of 6-8
g per liter of ascites removed. In patients in whom <5L are being removed,
synthetic plasma expanders can be used instead of albumin [25] and it has been
suggested that plasma volume expansion may not be necessary in this situation.
Sodium restriction and diuretics should be used concomitant to LVP. TIPS has
been compared to LVP+A in two large multicenter trials [26;27] and, although
associated with a slower recurrence of ascites, TIPS is associated with higher
rates of severe encephalopathy and no differences in mortality. Therefore, as
mentioned in a recent consensus conference, TIPS should be relegated to patients
with refractory ascites who require very frequent sessions of LVP (
month) and in whom a favorable post-TIPS evolution can be predicted, i.e.,
patients with a Child score of <12 points [28].
Treatment of hepatorenal syndrome (HRS)
HRS is the result of extreme vasodilatation with an extreme decrease in
effective blood volume that leads to maximal activation of vasoconstrictive
systems, renal vasoconstriction and renal failure. HRS has been divided into
type 1 and type 2. Type 1 HRS is characterized by rapidly progressive renal
failure with a doubling of serum creatinine to a level greater than 2.5 mg/dl or
a halving of creatinine clearance to less than 20 ml/min in less than two weeks.
The prognosis of type 1 HRS is extremely poor with a median survival of about 2
weeks [29]. In type 2 HRS serum creatinine is greater than 1.5 mg/dl and/or
creatinine clearance is less than 40 ml/min but renal failure is more slowly
progressive and it has a better prognosis. The definitive treatment for HRS in
patients with cirrhosis is likely to remain liver transplantation. Anecdotal
studies show that vasoconstrictors together with albumin or TIPS may be useful
in reversing HRS but this remains to be confirmed in randomized controlled
trials.
Treatment of hepatic encephalopathy (HE)
As recently defined in a consensus conference [30], HE reflects a spectrum of
neuropsychiatric and psychometric test performance abnormalities occurring in
patients with significant liver dysfunction after exclusion of other known brain
diseases. The initial management of acute, episodic, HE involves two steps. The
first and primary step is the identification and correction of precipitating
causes [31]. Careful evaluation should be performed to determine the presence of
hypovolemia, gastrointestinal bleeding, infections, including SBP, intake of
sedatives or tranquilizers. The second step is the administration of lactulose
(orally or by enema). Patients with chronic HE should be treated with oral
lactulose at a dose adjusted to obtain 2-3 soft bowel movements/day. In patients
with chronic HE who are not tolerant or do not respond to lactulose, the
addition of neomycin (starting at 1-3 g per day in 3 doses) or metronidazole
(starting at 250 mg PO BID) may be of benefit. Long-term protein restriction
should be avoided and a protein content of 1-1.5 g/kg/day protein diet is
recommended. Protein from dairy or vegetable sources may be preferable to
animal-derived protein.
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