# Cardio Shock — Calculate CPO and PAPi

> Medical calculator for CPO and PAPi assessment for mechanical support candidacy. (iPhone/iPad app by Affan Haleem.)

- Source: https://appshunter.io/ios/app/cardio-shock/id1439394483 (this page in markdown: same URL + `.md`)
- Developer: [Affan Haleem](https://appshunter.io/developer/1380371873)
- Category: Medical, Utilities
- Price: Free
- Rating: 5.00/5 from 4 App Store ratings · 1 written reviews indexed
- Age rating: 17+
- Requires: iOS 12.0 · 7 MB
- Languages: American English
- Released: 2018-10-19
- Data updated: 2026-08-21
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/cardio-shock/id1439394483/reviews.md

## What is Cardio Shock?

Calculate CPO and PAPi to assess if patient is a candidate for mechanical support.

The "recommendations" are based on the findings of The Detroit Shock Initiative:
Basir MB, Schreiber T, Dixon S, Alaswad K, Patel K, Almany S, Khandelwal A,
Hanson I, George A, Ashbrook M, Blank N, Abdelsalam M, Sareen N, Timmis SBH,
O'Neill Md WW. Feasibility of early mechanical circulatory support in acute
myocardial infarction complicated by cardiogenic shock: The Detroit cardiogenic
shock initiative. Catheter Cardiovasc Interv. 2018 Feb 15;91(3):454-461. doi:
10.1002/ccd.27427. Epub 2017 Dec 20. PubMed PMID: 29266676.

Disclaimer:
Please note that this app does not replace clinical judgement. I can not take responsibility for the outcomes of the use of this app. There is no single standard formula for the calculation of BSA or cardiac output. Many authors recommend reducing peak oxygen consumption to 110mL O2/min for patients over the age of 75. This app uses the standard 125mL O2/min for all patients. 

Formulas:
BSA is calculated as square root (heigh*weight)/36
Fick calculated as 125xBSA/ ((SAO2-SVO2) * hgb * 13.4. 

Finally:
I have no relevant financial conflicts of interests or financial gains from use of this app.
I'm just another idealistic general cardiology fellow looking to make a difference. 

For questions, concerns (or if you you're looking to hire for your interventional spot) my email is: AffanHaleemAppStore@gmail.com

## Key features

- CPO calculation
- PAPi calculation
- Mechanical support assessment
- Based on Detroit Shock Initiative findings
- BSA and Fick formulas

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/cardio-shock/id1439394483/reviews.md

### 5/5 — Wonderful source for CCU and ICU rotations

*2019-06-17*

I love this app. It has made my CCU rotation so easy. Being a cardiology fellow myself, I recommend this app to every internal medicine resident. It is updated as per latest Detroit cardiogenic shock management guidelines.

## Frequently asked questions about Cardio Shock

### What is Cardio Shock used for?

Cardio Shock is used to calculate Cardiac Power Output (CPO) and Pulmonary Artery to Pulmonary Artery Index (PAPi) to help assess if a patient is a candidate for mechanical support. The calculations are based on findings from The Detroit Shock Initiative.

### What medical formulas does Cardio Shock use?

Cardio Shock calculates Body Surface Area (BSA) using the formula: square root (height*weight)/36. It then uses the Fick method for cardiac output, calculated as 125xBSA / ((SAO2-SVO2) * hgb * 13.4).

### Does Cardio Shock replace clinical judgment?

No, Cardio Shock explicitly states that it does not replace clinical judgment. The developer cannot take responsibility for the outcomes of its use, emphasizing that it is a tool to aid, not dictate, medical decisions.

### What is the age rating for Cardio Shock?

Cardio Shock has an age rating of 17+. This is likely due to the complex medical nature of the calculations and its intended audience of healthcare professionals.

### How often is Cardio Shock updated?

The latest version of Cardio Shock is 1.3, which was last updated on January 13, 2019. This indicates a less frequent update cycle for the application.

### What devices is Cardio Shock available on?

Cardio Shock is available for iPhone, iPad, and iPod. It is designed for iOS devices.

### Does Cardio Shock have ads?

No, Cardio Shock does not contain advertisements. It is a completely ad-free application.

### What is the user rating for Cardio Shock?

Cardio Shock has a high user rating of 5.0 stars, based on 4 ratings. This suggests a very positive reception from its current user base.

## Version history (last 4 of 4)

### 1.3 — 2019-01-13

Cardiac output is now indexed for BSA

### 1.2 — 2018-12-08

Added fick cardiac output calculator

### 1.1 — 2018-10-19

Scroll bar added

### 1.0 — 2018-10-18

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-21.*