Your scale knows
something is wrong
3 days before you do.
When your heart isn't pumping efficiently, fluid quietly builds up. Your weight is the first sign. Ziva tracks it every morning, spots the trend, and tells you - and your care team - before it becomes an emergency.
Used by heart failure patients alongside their cardiologist or care team.
Ziva Health is an AI-powered health companion for managing conditions like heart failure through daily tracking and personalised coaching. Isabella is Ziva's AI health coach - she tracks your weight, fluid intake, symptoms, and medications every day and tells you when something is changing, in plain language. When she sees a pattern that needs clinical attention, she alerts your care team.
Three steps to staying ahead of your heart failure.
Heart failure self-management
starts with five daily habits.
Most heart failure admissions are preventable. The warning signs are there - in your weight, your fluid intake, your symptoms, your medication schedule. Ziva reads them all together every day and tells you what's changing, so you and your care team can act before it becomes serious.
One pound of weight gain
is half a litre of fluid.
When your heart is struggling, excess fluid accumulates in your body - in your lungs, your legs, your abdomen. Your weight reflects this before any symptom does. A morning weigh-in is the single most important thing you can do to protect yourself from an unexpected hospitalisation.
Salt and fluid are the two
biggest drivers of fluid buildup.
Sodium causes your body to retain water. Too much fluid adds to the workload of an already struggling heart. Most heart failure patients have both a daily sodium target and a fluid limit - but tracking them without help is genuinely hard. Isabella counts both for you throughout the day and tells you how much room you have left before dinner.
Breathlessness, swelling, fatigue —
Isabella connects them to your weight.
Symptoms alone can be hard to interpret. Weight gain alone might not trigger your alert threshold yet. But when both are moving in the same direction at the same time, Isabella sees it - and acts on it, even when either signal on its own might seem insignificant.
Isabella builds your heart failure
routine around your day.
Not generic heart health tips - a specific routine for your condition, your limits, and your targets. The same time each day. The same scale. The same simple questions. Done consistently, this routine gives your care team a clear picture and gives you real control.
Why daily weight works.
The relationship between weight, fluid retention, and heart failure outcomes is one of the best-studied areas in cardiology. This is what the evidence shows.
Your care team should
see what you see.
Whether your cardiologist already uses Ziva or is hearing about it for the first time - there are two things you can do right now. Both help you get better care.
What is heart failure?
Heart failure - sometimes called congestive heart failure or CHF - is a chronic condition in which the heart cannot pump blood as efficiently as the body needs. This does not mean the heart has stopped; it means it is working harder than usual but delivering less. As a result, fluid backs up into the lungs, abdomen, and legs, causing the breathlessness, swelling, and fatigue that characterise the condition. Around 64 million people worldwide live with heart failure, making it one of the most common reasons for hospitalisation in adults over 65.
Types of heart failure
Heart failure is classified by ejection fraction (EF) - the percentage of blood the heart pumps out with each beat. A healthy EF is 55–70%.
Common causes
Heart failure is usually the result of another condition that has damaged or overworked the heart over time:
- →Coronary artery disease — reduced blood flow to the heart muscle causes damage over time; the most common cause of HFrEF
- →High blood pressure (hypertension) — forces the heart to work harder over years, thickening and stiffening the walls; major cause of HFpEF
- →Previous heart attack — scar tissue reduces pumping efficiency; a major trigger for HFrEF
- →Atrial fibrillation (AFib) — irregular rhythm reduces the heart's efficiency; especially linked to HFpEF
- →Cardiomyopathy — disease of the heart muscle itself, which can be inherited, viral, alcohol-related, or idiopathic
- →Valvular disease — leaking or narrowed valves put extra strain on the heart chambers over time
Symptoms to know
Heart failure symptoms worsen as fluid accumulates. The earlier you catch them, the simpler the correction:
- →Weight gain of 2+ lb overnight
- →Socks or shoes feeling tight
- →Waking more than once to use the bathroom
- →Needing an extra pillow to sleep
- →Feeling more fatigued than usual
- →Breathlessness at rest or worsening
- →Significant ankle or leg swelling
- →Weight gain of 5+ lb in a week
- →Unable to lie flat to sleep
- →Heart palpitations or dizziness
Managing heart failure day to day
Heart failure is a chronic condition - there is no cure, but it can be well-managed. The goal is to keep the heart as stable as possible, reduce the frequency and severity of flare-ups, and protect quality of life. The pillars of self-management are:
- →Daily weighing — the most important single habit; fluid accumulates quietly and weight is its earliest signal
- →Sodium restriction — typically 1,500–2,000mg/day; sodium causes fluid retention and directly worsens symptoms
- →Fluid restriction — many CHF patients have a daily fluid limit (typically 1.5–2L); counting every drink matters
- →Medication adherence — diuretics, ACE inhibitors, beta-blockers, and newer agents (SGLT2 inhibitors, ARNIs) must be taken consistently; missing doses can trigger rapid decompensation
- →Appropriate activity — regular gentle exercise (within your limits) improves cardiac function and quality of life; cardiac rehabilitation is recommended where available
- →Symptom recognition — knowing your early warning signs means you can act days before a hospitalisation becomes necessary
What people ask.
Ziva Health is a wellness and health-coaching app. It is not a medical device and does not diagnose, treat, or prescribe. All content is for informational purposes only. Always consult a qualified healthcare professional - including your cardiologist or heart failure nurse - for medical decisions about your condition.
Step on the scale.
Isabella watches
everything else.
One weigh-in per morning. Isabella tracks the trend, coaches your day, and alerts your care team before fluid becomes a crisis.
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