PMC10226311_01
Radiographs during one of the episodes of tachypnoea and dyspnoea in (a,b) case 1 and
(c,d) case 2. (a,c) Dorsoventral and (b,d) right lateral radiographs show pulmonary
oedema consistent with congestive heart failure
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The cat developed the first respiratory episode at 8 months of age and was diagnosed via radiographs with CHF (Figure 1).
Still images taken at end-diastole from the echocardiographic evaluation of (a-c)
case 1 and (d-f) case 2: (a,d) four-chamber right-sided parasternal long-axis view;
(b,e) right-sided parasternal short-axis view at the level of the papillary muscles;
and (c,f) right-sided short-axis view at the level of the left atrium and aorta
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An echocardiogram showed an HCM phenotype with normal LA size (Figure 2; see Table S1 in the supplementary material).
A single-lead ECG tracing obtained by the owner using a mobile ECG (AliveCor) device.
Note the sinus rhythm converting into paroxysmal supraventricular tachycardia. Paper
speed = 25 mm/s; sensitivity 10 mm/mV
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Two weeks later, the cat had a short-lasting tachypnoea and paroxysmal SVT episode (Figure 3).
PMC10226311_02
Radiographs during one of the episodes of tachypnoea and dyspnoea in (a,b) case 1 and
(c,d) case 2. (a,c) Dorsoventral and (b,d) right lateral radiographs show pulmonary
oedema consistent with congestive heart failure
10.1177_20551169231166528-fig1.jpg
PMC10226311_02_10.1177_20551169231166528-fig1.jpg
fig1-20551169231166528
The cat developed the first respiratory episode at 8 months of age and was diagnosed via radiographs with CHF (Figure 1).
Still images taken at end-diastole from the echocardiographic evaluation of (a-c)
case 1 and (d-f) case 2: (a,d) four-chamber right-sided parasternal long-axis view;
(b,e) right-sided parasternal short-axis view at the level of the papillary muscles;
and (c,f) right-sided short-axis view at the level of the left atrium and aorta
10.1177_20551169231166528-fig2.jpg
PMC10226311_02_10.1177_20551169231166528-fig2.jpg
fig2-20551169231166528
An echocardiogram showed an HCM phenotype with normal LA size (Figure 2; see Table S1 in the supplementary material).
Six-lead electrocardiogram tracings obtained from case 2 shortly after presentation
at the referral hospital displaying continued narrow complex tachycardia
(supraventricular tachycardia) with a heart rate of 320 bpm. Paper speed 50 mm/s;
sensitivity 0.5 cm/mV
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The cat re-presented with an HR of 320 bpm and recurrent SVT (Figure 4), tachypnoea, signs of cardiogenic shock (subdued mentation, pale-pink mucous membranes and absent femoral pulses with cold extremities) and severely matted fur covering approximately 80% of the abdomen.