# Symptoms and Phases of Chronic Heart Failure
Chronic heart failure occurs in stages. The complaints and what someone can do vary greatly by phase, and also between people. Here you can read which symptoms occur in which phase and what their consequences are for daily life.
NYHA Class I: No or very mild symptoms
In this phase, the heart has trouble pumping, but you don't notice that every day. Many people only discover they have heart failure through a routine exam or because other problems (such as high blood pressure) are being investigated.
**Possible symptoms:**
- No complaints during normal exercise
- Possibly slightly dizzy after a very heavy physical strain
- Sometimes unnoticed, a little less energetic than before
**What it means for daily life:**
You can do your job, climb stairs, carry groceries and exercise without any problems. Many people feel completely healthy.
**Commonly known information about this phase: **
This phase can last for years. How long depends on what caused the heart failure and how well the underlying condition (such as high blood pressure) is under control. With regular check-ups and appropriate care, many people can stay in this phase.
---
NYHA Class II: Mild symptoms during exercise
In this phase, you notice that your heart has to work harder. Normal activities are still going well, but you can feel boundaries appear.
**Possible symptoms:**
- Shortness of breath during strenuous exercise (e.g. walking up a hill, playing hard in sports)
- Get tired quickly during physical activity
- Slight swelling of the ankles, especially at the end of the day
- Less interest in activities because you know you'll be tired afterwards
- Heart palpitations (feeling a strong or irregular heart rhythm)
- Nocturnal cough, especially in certain body positions
- Sleep doesn't feel refreshed
**What it means for daily life:**
You can do your normal work and household, but strenuous exercise (heavy sports, moving furniture, long gardening) causes more tiredness or shortness of breath. You adjust your activities unnoticed: you run slower, take breaks more often, or avoid situations that you know are hard for you. Planning trips requires more preparation.
**Commonly known information about this phase: **
This is a long phase for many patients. The duration varies greatly from person to person and depends on age, underlying causes (such as myocardial infarction, high blood pressure or heart valve disorders) and how well the treatment works. Regular visits to the doctor and medication help to stabilize this phase.
---
NYHA Class III: Obvious symptoms during mild exercise
Now you get short of breath and fatigued when doing activities you wouldn't normally have trouble doing. Heart failure noticeably limits your daily life.
**Possible symptoms:**
- Shortness of breath even with mild exercise (normal walking, small household chores)
- Shortness of breath even at rest, especially lying down
- Strong nocturnal coughing; sometimes you have to sit up to breathe better
- Swollen ankles, sometimes including knees, shins or thighs
- Feet may be swollen in the morning
- Sudden strong tiredness
- Painful abdominal distension (due to fluid collection in the liver)
- Less appetite, nauseous feeling
- Concentration problems due to poor blood flow to the brain
- Sleep apnea (breathing stops at night) is more common
- Having to go to the toilet a lot at night
**What it means for daily life:**
You are considerably limited. Shopping, cleaning, walking to the neighbors — these are tough jobs now. You have to take more frequent breaks, you are dependent on help for household chores, and your sleep is disturbed. Many people feel sad and anxious because their freedom is so limited. Steam trips, air travel and long drives are becoming risky. You can still work from home or do light work, but most jobs are not attainable.
**Commonly known information about this phase: **
This phase requires more intensive care and regular check-ups. Hospitalization is more common. Tests show that life expectancy is shorter than in class II, but this varies greatly from person to person — age, underlying causes, kidney function and how your body responds to medications all play a role. People can stay in this phase for months to years.
---
NYHA class IV: Symptoms at rest
This is the most severe phase. Your heart pumps insufficient blood, even when you are completely still. You feel sick and limited.
**Possible symptoms:**
- Shortness of breath even at rest, particularly when lying down
- Shortness of breath that worsens with light activity
- Extreme fatigue — you feel constantly exhausted
- Nighttime shortness of breath that wakes you up (paroxysmal nocturnal dyspnea)
- Significant swelling of feet, legs and abdomen
- Bloated abdomen with pain
- Fast or irregular heartbeat noticeable
- Much less appetite, constantly nauseous
- Confusion, concentration problems
- Blue or gray discoloration of lips, nose or fingertips (poor oxygen levels)
- Constant coughing, sometimes with pink frothy sputum
- Severe sleep disturbances
- Feet and legs feel cold
**What it means for daily life:**
You are largely confined to bed or chair. Even going to the toilet is exhausting. Showering or dressing requires help. You are completely dependent on your caregivers. Many people feel afraid, sad and helpless. Traveling is virtually impossible. Hospital and emergency clinic visits are regular.
**Commonly known information about this phase: **
This is a serious phase where the focus is on comfort, symptom management and supportive care. Some patients in class IV are admitted to hospital (acute heart failure), others are cared for at home with intensive support. Survival in this phase is shorter, but here too there are great individual differences — some stabilize somewhat with proper care, others deteriorate faster. This depends on age, kidney function, the underlying cause and response to medications.
---
Acute decompensation (sudden deterioration)
Sometimes heart failure worsens abruptly rather than gradually. This can happen even in someone in class I or II.
**Possible signs of acute decompensation:**
- Sudden, severe shortness of breath
- Chest congestion (very tight feeling in the chest)
- Vomiting or nausea
- Extreme fatigue
- Feet or legs swell rapidly
- Heart palpitations or irregular heartbeat
- Confusion or disorientation
- Gray or blue-tinged skin
This can be caused by infections (pneumonia, flu), irregular heartbeat, very high blood pressure, or not taking medications properly. Acute decompensation is a medical emergency — hospitalization is almost always necessary.
---
When to contact your doctor or hospital?
**Contact your GP or cardiologist quickly if:**
- Your shortness of breath increases, even at rest or lying down
- You become tired much more quickly than usual
- Your feet or legs swell rapidly
- You cough a lot at night or wake up with shortness of breath
- Your abdomen feels bloated and painful
- You feel much stronger heart palpitations
- You have less appetite and feel nauseous
**Call 112 or go directly to emergency if:**
- You have severe shortness of breath, even at rest
- You have chest tightness or severe chest pain
- You are confused or disoriented
- Your lips, nose or fingertips turn blue or grey
- You feel your heart pounding uncontrollably or beating irregularly and tight
- You are vomiting and very short of breath
---
_This information never replaces a doctor's judgment. Always discuss your situation with your own healthcare provider._