Splanchnic and systemic vasodilation reduce vascular resistance, increasing heart rate and cardiac output at rest.
← LCCH Physiology
Module 07
How can a high-output circulation hide cardiac dysfunction?
Start with the hyperdynamic circulation, then reveal impaired beta-adrenergic responsiveness, diastolic dysfunction, abnormal strain, electrophysiology and the stressors that expose limited reserve.
Clinical frame
The organising problem.
Resting cardiac output may be high in cirrhosis because systemic vascular resistance is low. That favourable-looking number can coexist with impaired contractile reserve and diastolic dysfunction that become clinically important during sepsis, TIPS or transplantation.
Mechanism · Hyperdynamic state
Low afterload drives high output
01Systemic vasodilation
02↓ afterload
03↑ HR / stroke volume
04High resting cardiac output
Neurohumoral activation and plasma-volume expansion support a high-flow circulation against low afterload.
High resting output should not be mistaken for normal myocardial reserve.
Step 1 of 6
A good resting number is not a stress test.
Change the loading conditions and follow forward flow and filling pressure separately.
Lower afterload. A cirrhotic circulation becomes hyperdynamic.
- 01
Systemic afterload
ReferenceUsual vascular resistance
Selected scenarioResistance falls
- 02
Venous return / preload
ReferenceTolerated venous return
Selected scenarioVolume state varies
- 03
Forward flow
ReferenceOutput meets demand
Selected scenarioResting output may be high
- 04
Filling pressure
ReferenceAcceptable filling pressure
Selected scenarioReserve remains untested
Why this happens
Ejecting into a low-resistance circulation can preserve EF and support high resting output. This does not establish the response to a future stressor.
What to look for
Read EF alongside loading conditions and other measures of cardiac function.
Limit of the model A hyperdynamic circulation alone does not diagnose cirrhotic cardiomyopathy.
Sources and context: Cirrhotic Cardiomyopathy Consortium (2020) ↗EASL TIPS guideline (2025) ↗
Go deeper
Mechanisms beneath the model.
Open the topics you need. Keep several explanations visible to compare mechanisms.
Evidence key: Established: broadly supported. Nuanced: context affects interpretation. Evolving: evidence or definitions remain unsettled. These labels describe physiological certainty, not a formal GRADE rating.
01MaskingLow afterload can conceal systolic impairmentEstablished
Ejection fraction is load-dependent. A vasodilated circulation can preserve or elevate EF even when intrinsic contractile reserve is impaired.
- Normal resting EF does not exclude cirrhotic cardiomyopathy.
- Global longitudinal strain can add sensitivity.
- Stress and changing afterload are clinically revealing.
02DiastoleFilling pressure matters as much as forward flowEstablished
Diastolic dysfunction becomes important when plasma volume or venous return increases abruptly.
- Left atrial and pulmonary pressures can rise despite preserved EF.
- TIPS is a deliberate preload challenge.
- Renal venous congestion can complicate the haemodynamic picture.
03DefinitionDiagnostic criteria continue to evolveEvolving
Modern consensus approaches use echocardiographic systolic and diastolic measures rather than the older concept of stress-induced EF reduction alone.
- Different cohorts and loading conditions complicate thresholds.
- Cardiac biomarkers can support but do not define the syndrome alone.
- The clinically important construct is limited cardiovascular reserve in cirrhosis.
04LoadingEjection fraction is a fraction under particular loading conditionsEstablished
EF describes the proportion of end-diastolic volume ejected. It is influenced by loading conditions and is not a direct measurement of intrinsic contractility. Low systemic resistance can make ejection appear satisfactory even when the ability to increase output under stress is limited.
- High resting output and normal EF answer different questions from whether the heart can tolerate higher demand or afterload.
- Strain, tissue Doppler, chamber structure and loading conditions provide complementary information. Strain also remains load-dependent.
- A change in EF across an acute haemodynamic intervention needs interpretation in the context of changing preload and afterload.
05ReserveForward flow can be maintained at the cost of congestionNuanced
An impaired-relaxation or less compliant ventricle may require greater filling pressure to accept additional volume. Output may initially be maintained while pulmonary or systemic venous pressure rises. The lungs and kidney can therefore reveal intolerance before a striking change in EF.
- TIPS redistributes flow towards the systemic circulation and can expose limited preload reserve.
- Increasing vascular tone changes ventricular afterload as well as arterial pressure; the myocardial response may limit the benefit.
- Cirrhotic cardiomyopathy requires an appropriate clinical and echocardiographic assessment. Dyspnoea after TIPS is not diagnostic by itself.
Interventions
What are we trying to change?
Therapy makes more sense when its physiological target is explicit. These are mechanism summaries, not prescribing guidance.
TargetPreload and filling pressure
Volume strategy
Careful volume assessment aims to preserve perfusion without provoking pulmonary or venous congestion.
TargetSystemic vascular resistance
Vasopressors
Restore vascular tone in vasoplegia but simultaneously increase ventricular afterload.
TargetReserve and structural disease
Pre-TIPS / transplant cardiac assessment
Identifies patients at higher risk from abrupt preload and haemodynamic shifts.
Apply the mechanism.
What not to conclude.
- Calling a high cardiac output ‘good cardiac function’.
- Using resting EF as the only measure of reserve.
- Treating post-TIPS dyspnoea as simple fluid overload without considering filling pressure and cardiac dysfunction.
- Ignoring chronotropic and electrical abnormalities.
Four things to keep.
- Cirrhosis creates a high-output, low-resistance circulation.
- Low afterload can hide impaired myocardial reserve.
- Diastolic dysfunction makes abrupt preload changes hazardous.
- Critical illness and TIPS act as physiological stress tests.
Evidence & current guidance
Where the physiology meets current practice.
Clinical criteria and treatment recommendations change faster than core physiology. This layer keeps the module tied to current consensus and primary evidence.
High cardiac output does not mean normal cardiac reserve
Cirrhosis creates a hyperdynamic circulation: systemic vascular resistance falls, plasma volume expands and resting cardiac output often rises. Against that low afterload, conventional resting systolic indices can look reassuring even when myocardial reserve is impaired. The clinically important phenotype is therefore often stress intolerance rather than obvious resting pump failure.
- Low systemic vascular resistance can preserve or exaggerate resting LVEF despite impaired intrinsic contractile performance.
- Sepsis, haemorrhage, vasopressors, TIPS and liver transplantation can abruptly expose limited cardiac reserve.
- Diastolic dysfunction may coexist with apparently preserved systolic function and can make the circulation particularly preload-sensitive.
- The ICU question is not simply 'what is the EF?' but 'can this heart augment output and tolerate changing preload/afterload when stressed?'
Modern criteria move beyond the old E/A-ratio definition
The Cirrhotic Cardiomyopathy Consortium modernised the definition using contemporary echocardiography. Systolic dysfunction can be identified by reduced LVEF or abnormal global longitudinal strain, while advanced diastolic dysfunction is defined using a combination of tissue Doppler, filling-pressure, left-atrial-volume and tricuspid-regurgitation-velocity variables.
- Systolic dysfunction: LVEF ≤50% or absolute global longitudinal strain <18% in the Consortium framework.
- Advanced diastolic dysfunction: at least 3 of septal e′ <7 cm/s, E/e′ ≥15, LAVI >34 mL/m² and TR velocity >2.8 m/s, with pulmonary vascular disease considered when interpreting TR velocity.
- Chronotropic/inotropic reserve, ECG abnormalities, biomarkers and cardiac MRI remain useful phenotyping tools but are not all embedded in the core diagnostic definition.
- A normal resting study does not exclude clinically important stress-related dysfunction.
The cirrhotic heart is altered at receptor, membrane, inflammatory and structural levels
The phenotype is not explained by loading conditions alone. Proposed mechanisms include impaired beta-adrenergic signalling, membrane and ion-channel abnormalities, inflammatory mediators, altered nitric-oxide/endocannabinoid signalling, mitochondrial/metabolic dysfunction and myocardial fibrosis. Their relative contribution varies between patients and disease stages.
- Blunted beta-adrenergic responsiveness limits the normal increase in contractility and heart rate during stress.
- Fibrosis and altered myocardial relaxation contribute to diastolic dysfunction and reduced compliance.
- Electrophysiological abnormalities, including QTc prolongation, are common but are not synonymous with mechanical cardiomyopathy.
- Systemic inflammation and ACLF may acutely worsen a chronic substrate, creating a mixed cardiocirculatory phenotype.
TIPS is a deliberate preload challenge
A TIPS diverts portal blood into the systemic venous circulation and acutely increases venous return. That is beneficial for portal decompression but can unmask occult left- or right-sided dysfunction. The 2025 EASL TIPS guideline therefore treats cardiopulmonary reserve as a core part of patient selection.
- TIPS commonly raises right-atrial pressure; EASL cites an acute increase of roughly 3–5 mmHg in patients without portopulmonary hypertension.
- Pre-TIPS assessment should include ECG and comprehensive transthoracic echocardiography; BNP/NT-proBNP may contribute to risk stratification.
- Elective TIPS should not be performed in severe left- or right-sided cardiac dysfunction, untreated severe valvular disease or moderate–severe pulmonary hypertension despite optimisation.
- Post-TIPS dyspnoea, rising filling pressures, renal deterioration or congestion should prompt assessment for cardiac decompensation rather than being attributed automatically to liver disease.
Liver transplantation can reveal — and sometimes reverse — the phenotype
Liver transplantation removes the portal-hypertensive and inflammatory driver but also imposes major haemodynamic stress. Contemporary data increasingly frame cirrhotic cardiomyopathy as a risk phenotype for peri- and early post-transplant heart failure rather than an automatic contraindication to transplantation.
- Subclinical cirrhotic cardiomyopathy is not, by itself, considered a contraindication to liver transplantation.
- The perioperative period combines major preload/afterload shifts, vasoactive exposure and ischaemia–reperfusion stress.
- Cardiac function may improve after transplantation, but recovery is heterogeneous and may take months to years; universal rapid reversibility should not be assumed.
- Coexisting MASLD, diabetes, obesity, hypertension or coronary disease increasingly complicate attribution of post-transplant cardiac dysfunction to cirrhotic cardiomyopathy alone.
Think in terms of reserve, congestion and loading conditions — not EF alone
In critical illness, the observed cardiac phenotype reflects both intrinsic myocardial dysfunction and the loading environment. Low afterload can conceal systolic dysfunction; vasopressors can reveal it. Fluid or TIPS can expose diastolic and right-sided limitations. Renal dysfunction may then reflect venous congestion as much as arterial underfilling.
- Serial echo is often more informative than a single resting study when haemodynamics are changing.
- GLS, tissue Doppler, filling pressures, right-heart assessment and biomarkers add information beyond EF.
- A rising MAP with worsening congestion or renal function may represent a different problem from persistent vasoplegia.
- Cardiac reserve is directly relevant to both HRS-AKI and TIPS because the heart is part of both syndromes.
Key sourcesPrimary guidance and landmark evidence
Reviewed 12 September 2026 · next scheduled review September 2027Redefining Cirrhotic Cardiomyopathy for the Modern EraIzzy M, et al. Hepatology. 2020;71:334–345. doi:10.1002/hep.30875.
Cirrhotic Cardiomyopathy Consortium paper defining the modern echocardiographic framework and moving beyond the older 2005 criteria.
View source ↗Cirrhotic cardiomyopathy: pathophysiology, assessment, and implications for liver transplantationReview published 2026; PubMed PMID 41743375.Recent synthesis emphasising blunted cardiac reserve, stress intolerance, transplant implications and the variable trajectory of recovery after transplantation.
View source ↗EASL Clinical Practice Guidelines on TIPSEuropean Association for the Study of the Liver. J Hepatol. 2025;83:177–210. doi:10.1016/j.jhep.2025.01.029.Current guidance for cardiopulmonary assessment before TIPS, including echocardiography, natriuretic peptides and major cardiac contraindications.
View source ↗Diagnostic Criteria of Cirrhotic Cardiomyopathy: Out With the Old, in With the New?Liu H. Hepatology. 2021. doi:10.1002/hep.32021.Concise comparison of the historic and modern diagnostic criteria and the rationale for tissue-Doppler/strain-based assessment.
View source ↗Review policy: each module is reviewed at least annually and sooner after a major guideline, consensus statement or practice-changing study. A review date indicates editorial review, not that every linked source is open access.