| Cover | Jul. 29, 2024 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jul. 29, 2024 |
| Entity File Number | 001-41422 |
| Entity Registrant Name | Heart Test Laboratories, Inc. |
| Entity Central Index Key | 0001468492 |
| Entity Tax Identification Number | 26-1344466 |
| Entity Incorporation, State or Country Code | TX |
| Entity Address, Address Line One | 550 Reserve Street |
| Entity Address, Address Line Two | Suite 360 |
| Entity Address, City or Town | Southlake |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 76092 |
| City Area Code | 682 |
| Local Phone Number | 237-7781 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Common Stock [Member] | |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | HSCS |
| Security Exchange Name | NASDAQ |
| Warrants | |
| Title of 12(b) Security | Warrants |
| Trading Symbol | HSCSW |
| Security Exchange Name | NASDAQ |
